Abstract
The Varjuy rocky temple is one of the prominent buildings with religious purposes and troglodytic architecture on the slopes of Sahand volcanic mountain. It is located in Varjuy village, Maragheh City, East Azerbaijan Province. Verjui Village is located Varouy in the vernacular. The name “Varouy” is composed of two words of “var” with the meaning of sun and “ouy” with the meaning of house in Turkish. So, the name “Varouy” means the house of sun. This name plays a key role in understanding the meaning of this valuable Varjuy complex. Maragheh City was one of the most important cities in Azerbaijan during the Seljuk period. As the first capital of the Il-Khanid (or Mongol) dynasty, this city played a key role in the developments of that era. Maragheh city, with an area of about 5388 km2, is located on the southern slopes of Sahand Mountain in East Azerbaijan Province. It is located in 130 km of Tabriz and limited to Tabriz city from the north, Hashtrood City from the east, Urmia Lake from the west and Miandoab City from the south.
Keywords: Maragheh, Troglodytic Architectural, Varjuy Rocky Temple, Architectural Decoration, Inscription.

Introduction
Today, that room of this temple which was decorated with Muqarnas is known as Mullah Maso’om Imamzadeh, which is the burial site of Mullah Maso’om Maragheh (a scholar lived in Maragheh in the 13th century AH). Until recently, it has been the dome-shaped cover above the openings of Varjuy Rocky Temple but is now destroyed. In previous references, less attention has been paid to the architectural decorations of this troglodytic complex, and in general, many previous studies have repeated the history, use and rock reliefs of this troglodytic buiding. Since no specialized studies have been done on the architectural decorations of this complex so far despite a variety of architectural decorations in this building and the evidence of the use of decorations made by materials other than stone in this building, the present study aims to recognize and introduce the architectural decorations applied in the troglodytic architecture of Varjuy rocky temple in Maragheh. Considering the research objective, field study (coding, photography of architectural spaces and architectural decorations, and detailed exploration of them) and library study are applied to verify the obtained information and then, content analysis is performed. The present study is applied-developmental research.
Data collection methods: A. Review and study of Persian texts in the field of troglodytic architecture will be done to extract historical and technical information. B. Field study and documentation of the status quo: Field studies will be performed to understand the troglodytic architecture of Varjuy Rocky Temple and especially, its architectural decorations. In the present study, observation is one of the necessary methods for deep understanding of the nature of the phenomena and variables studied. C. Analysis: After analyzing the information obtained from field studies and observations, at this stage, a more detailed analysis of the data and identified components will be performed and in this regard, important concepts and points will be extracted.
The review of historical and comparative studies on the troglodytic architecture of Varjuy Rocky Temple showed that there is still no single opinion about the uses of this complex in different periods, especially about its temple use. However, current studies show that this building was used in the Middle Islamic period (around the Il-Khanid period). Moreover, after introducing the spaces and their architectural and structural features, as well as studying the surfaces of the interior of this rocky temple, it was found that this building has architectural decorations, which have been not described and studied in other studies on this building. In addition, there are shortcomings in the identification and accurate reporting of the verses carved on the building body, as well as the lack of recognition of architectural layers and decorations of this building in previous studies. This building has been considered and applied in the Middle Islamic period and some architectural decorations of calcareous mortars have been executed on the body of its main Gonbad-khaneh (the space under the dome), and there is a need to revise the previous interpretations of rock reliefs of this building. We now know that in addition to rocky decorations in the form of Quranic Surahs, interior plaster is observed in the troglodytic architecture of this building and all the decorations in the interior of the main Gonbad-Khaned (V-6 space) were of plaster and not rock. In addition, the plaster has been renewed in different periods and different plastering techniques have been used for the interior.
Another point is that in most of the interior spaces, a plastering mortar has been used. The plaster in this building is considered architectural decoration. Considering the stiffness, color and materials of the mortar, it seems a kind of Pozzolan-lime mortar. The mortar has been applied in several layers, all of which belong to the Middle Islamic period, because there are Thuluth calligraphies below these layers. In the architectural decorations of this collection, the inscription has been executed in two different spaces using two different techniques: carving technique in space V4 and painted inscription technique in space V6. This point was identified for the first time in this research. Evidence shows the three layers of mortar applied to the dado of the main Gonbad-Khane of the studied temple. Among the characteristics of the abovementioned mortar, one can mention the high stiffness, gray color, low thickness and similarity of the bottom layer to the surrounding stone. Evidence also indicates the use of red pigment in the structure of the mortar, which made it red (top layer). Also, in the middle layer, plant fibers have been used extensively and their remains can be clearly seen.

Abstract
Ganjali Khan School (Caravanserai) in Kerman is one of the prominent buildings in Kerman from the Safavid period. Valuable gypsum arrays with different techniques have been implemented in this building. Among these arrays there are the Boumsab gypsum arrays that are executed in the royal room on all sides as well as the roof of the building. One of the special features of these arrays is the color of the mortar in the layers of the lower fine coat and the upper fine coat, which can be seen in three colors: red, yellow and gray. It should be noted that in the past, a layer of gypsum plaster has been applied on the surface of gypsum arrays in this building, but fortunately, in recent years, a large part of the additional layer has been peeled off the surface of gypsum arrays. Due to being special of this architectural arrangement and have not been done any detailed scientific study on these works so far, in this article, the structure of the colored mortars of this building has been investigated. Some of the questions of this research are: What is the structure of the colored mortars of Boumsab gypsum arrays in this building? What are the Major and Minor phases of mortar composition? What was the pigment in colored mortars? In this regard, sampling was done and FTIR, EDS, XRD analyzes were performed, which along with field studies, the research questions are answered. The results of the research show that gypsum mortar with the Major phases of gypsum and anhydrite has been used in different layers. Iron oxide (goethite) was also used to color the red and yellow mortars, and ash and lime were used for the gray mortar. Also, organic materials that used to change the quality of mortar were not identified in the structure of the samples.
Keywords: Gypsum Arrays, Colored Mortar, FTIR, EDS, XRD.

Introduction
Boumsab gypsum array is one of the types of low-rise architectural arrays. In this method, abrasion of areas from the fine coat (Intonaco) surface is done in order to create a different texture between the patterns and the background, the abrasion action covers only a part of the thickness of the fine coat layer and does not reach the layers under the fine coat. This method of stucco has been common in Isfahan since the time of Shah Abbas I (Aslani, 1391: 136). Ganjali Khan School (Caravanserai) in Kerman is one of the Monument in which the high quality Boumsab gypsum array has been executed. This Monument was built at the same time as the Ganjali Khan complex in the Safavid period, and one of the most beautiful architectural spaces in terms of architectural layout is the royal room, which is decorated with a gypsum arrangement of Boumsab. One of the features of the Boumsab gypsum array in this building that makes this array one of the other Boumsab gypsum arrays that have been identified as a result of the authors’ field studies (Aliqapoo in Isfahan, Pirnia House in Nain, Aliqapoo in Qazvin, and Kalkhoran Tomb in Ardabil), is the use of colored mortar in the fine coat layers performed in the royal school of Ganjali Khan School in Kerman. In this Monument, three colors of mortar are gray, red and yellow. Due to the fact that two layers of colored substrate are used on all sides as well as the ceiling of the room, at first it seems that gypsum mosaic is of Tokhmedaravari type, but by studying it closely, it can be concluded that Bumsab gypsum array. Another point is that the Boumsab gypsum array with these properties and with three colored mortars in one space, has been studied for the first time in Iran. 

Result and Discussion
FT-IR: In the spectrum of sample R-1 (Figure 5), the index vibrations of the gypsum can be seen in 3543, 1621, 1114, 670 and 600 cm-1 (Knittle et al., 2001: 635). However, there is a noticeable structural difference in this sample compared to the western side samples. In the spectrum of this sample, absorption bands of about 713, 874, 1430, 1800 and 2516 cm-1 are observed, which are related to carbonate vibrations in the calcite structure (Ylmen & Jaglid, 2013: 121). However, in addition to the absorption bands mentioned, bands of about 469, 521 (Fe-O), 795, and about 3650 cm-1 can be seen next to the 3543 cm-1 gypsum band. These absorption bands are generally visible in the red color spectrum of iron oxides. According to the researchers, these absorption bands and their position increase the possibility of using Hormoz bole or Armenian bole in this sample (ulaiuladienė et al., 2018: 249). 
EDS: The results of EDS analysis of the samples are presented in Table 1. For the amount of sulfur obtained from the S-2 sample in this study 13.02, the amount of 16.27% calcium is required for the gypsum composition. As can be seen in Table 2, the amount of calcium is greater than the amount required for the gypsum composition. 1.7% of the excess calcium can be related to the impurity of lime in the sample, which is normal in historical monuments. Examination of samples R-1, R-2 and R-3 show a significant amount of iron. Therefore, the results indicate the possibility of using iron compounds (ochre) as a red pigment in these samples.
XRD: Two samples R-1 and R-2 were examined using XRD, the results of which are presented in Table 3 and Figure 6. The main phases of R-1 are gypsum and anhydrite, and the sub-phases are quartz, kaolinite and goethite. The R-2 sample is similar to the R-1 sample in terms of the obtained phases, except that kaolinite is one of the main phases. Usually the scratch coat (Arriccio) has added soil and sometimes ash. A small amount of goethite seems to be sufficient to create a red color in the gypsum mortar. The study of the constituent phases of the G-1 sample structure was also performed using XRD, of which gypsum and anhydrite are the main phases and quartz and kaolinite are its sub-phases.

Conclusion
In this study, sampling was performed from different layers of colored mortar and specialized studies were performed. As a result of FT-IR, it can be said that the mortar of fine coat layers are made of gypsum with low lime impurity to which some red pigment has been added at the time of curing to make the mortar red. Also, no evidence of organic matter as additives to gypsum mortar was identified. The results of EDS analysis on gypsum mortar showed the presence of a small amount of excess calcium. Also, in the red mortars of the Bottom and top fine coat layers, iron was identified as the coloring agent and the presence of red was recently confirmed. In gray mortar, the presence of ash mixed with lime is a strong possibility. XRD analysis of four selected samples showed that the predominant phase in all four cases was gypsum and anhydrite, and only in one of the samples, kaolinite was identified as the main phase. The identified sub-phases are quartz, kaolinite and goethite. So far, no research has been published on the composition of Boumsab gypsum plaster with colored mortar. It can be imagined that at first, in order to implement the gypsum array for Tokhmehdaravari, Bottom and top fine coat layers were both applied with colored mortar, and for some reason (for which we don’t know) the decision was changed. Finally, the designs are executed only on the surface layer and And has been executed in a Boumsab manner. It is noteworthy that in the same complex (in the royal porch), a Tokhmehdaravari has been executed and can be seen at present.

Abstract
The more specialized and technical studies of historical paintings are the greater will be the history of Iranian art and, in fact, Iranian art and the identity of Iranian culture. Therefore, each of the historical cases will be valuable and influential. The purpose of this article is studying the nature of a destroyed paining on canvas and its overall shape, subject and identity which found in the storeroom of Mary Church of Isfahan. Accordingly, this article tries to answer the question of what is the nature of the painting discovered from the Mary Church of Isfahan? In order to achieve this goal, the library and field studies as well as laboratory studies including microscopic imaging and elemental analysis (SEM-EDS) was used for data collecting. In the following, it is attempted to prove the identity of the painting as Canvas-Marouflaged mural by comparative study of it with similar murals of the three churches of Vank, Maryam and Bethlehem. One of the main results of the research is the recognition of the painting from a technical and thematic point of view as well as its identification as a Canvas-Marouflaged mural and its presentation place at the time of the creation of the painting in front of the altar of Mary Church Isfahan.
Keywords: Canvas-Marouflaged Mural, Isfahan Mary Church, Painting, Angel of Seraphim.

Introduction
Murals as visual art works are among the most significant architectural decorations that have undergone many changes over time. The factor that distinguishes these works from other paintings is their dependence to the architectural space, which is known as the determining factor of their identity and authenticity (ICOMOS, 1964). In fact, a mural is designed and executed to complement the architectural space. It is completely coordinated with that space, so separating it from the architecture and displaying it in another place can changes or loses the values of mural and endanger its identity. Therefore, the detailed study of paintings in order to know their identity and nature is necessary.  Accordingly, the following points can be mentioned that clarify the necessity of this study: a) unknown specific characteristics for studied painting (marouflage), b) the lack of definite and specific criteria for displaying this painting, c) recognizing and differentiate the studied painting from the marouflage. Based on this, in this article, detailed studies have been carried out on an Iranian special painting, which at first glance seems to be the easel painting on canvas, which detailed investigations and studies present a hypothesis that it was a marouflage. The term marouflage refers to those paintings that are painted on a canvas and pasted on the wall in such a way that it is considered a part of the architecture. The marouflage separation from the original location distort its integrity and authenticity (Hamzavi et al., 2015: 131). This article aimed to find the nature of a historical painting discovered from Maryam Church in Isfahan, relying on technical studies and conservation issues, and tries to answer the main question of the research: What is the nature of discovered painting from Maryam Church in Isfahan?

Materials and Methods
The article is a qualitative and quantitative research based on the content of the research question and the achievement of the research aim. According to the type and necessity of the research, two theoretical and technical approaches can be introduced. In this research, primary data and information have been collected using the documentary and field methods as well as laboratory studies. Then the data has been analyzed according to the subject of the painting and its technical information to clarify how to perform the painting and display it (Figure 1). 
     The images, other than the ones mentioned in the reference, were took using a Canon EOS 700D / KissX7i DSLR camera with a Kit 18-135 lens. The metallography microscope model IMM 420 manufactured by Isfahan Optical Industries Company and fiberoptic device brand LECA CLS 100X connected to DSLR camera Canon EOS 700D / KissX7i used for imaging from the painting layers. Field emission electron microscope (FE-SEM) model MIRA3 manufactured by TESCAN company equipped with X-ray diffraction spectrometer (EDX) with resolution of 1.5 nm at 15 KV voltage and 4.5 nm at 1 KV voltage was used to determine the percentage of constituent elements and microscopic imaging with high magnification.

Data
After attaching the pieces of painting on canvas, the subject of the painting was revealed, which is a painting with the theme of a six-winged angel named Serafin (or Seraphim) (Hospian, 2014). Based on the visual and artistic characteristics of the painting and according to the date of construction of the Church of Maryam, its approximate date is attributed to the 18th century. The studied painting is in the form of Pābārik under the dome. Pābārik is one of the components of Kārbandi and is in the form of a kite. The painting is done on a cotton fabric support, which consists of sewing two pieces of fabric together (Figure 15). Being two pieces due to the small width of the fabric can be interpreted in the direction of the traditional weave of the fabric and attribute the time of the work to at least before the invention of weaving machines in the 19th century. Also, the texture of the fabric shows the non-uniformity of the thickness of the threads that make up the fabric, which can be a sign of manual and traditional spinning. There is the trace of frame in the edge of the painting (Figure 13) and in this part, there was a nail trace along with rust (Figure 14). Microscopic examinations of the cross-section of the painting in the gilded part show the existence of six layers and in the blue part of the painting background five layers (Figure 16). No trace of crushed gold particles (pigment) which is used in the production of gold color was seen, and a continuous and uniform sheet is visible in the scanning electron microscope image.

Discussion
Based on the shape, dimensions of the work, this hypothesis was created that the painting was probably custom made and adapted to one of the parts of the church building. According to the traces of nails left on the edge of the canvas, it installed on the wall after the execution. The subject of the painting is also related to the subjects of religion of Christians and is consistent with their beliefs. Visual observations of the interior of Maryam Church, Vank Church and Bethlehem Church in Isfahan show that the studied painting is compatible with other wall paintings in Armenian churches in terms of design, shape and subject. In such a way that the similar works are also in a Pābārik frame and they are executed as murals along with the image of the Seraphine angel with gilded wings under the dome. X-ray Electron Diffraction Spectroscopy (EDS) elemental analysis on the brown colored spots around the place of the nails in the edge of the support canvas (Figure 19, Table 1) shows the amounts of calcium oxide and sulfur oxide, which reinforces the possibility of the presence of calcium sulfate (gypsum). It strengthens the hypothesis of connecting the painting to a plaster wall.
The field survey of Maryam Church showed that the entire interior is covered with murals with various religious themes, except for the space in front of the altar, which it is contradictory by Christians believed in relation to the necessity of painting in all levels of churches. The existence of such a space inside the church creates the assumption that probably there were four murals in the Pābāriks in these parts as well. The size of the diameters of these Pābāriks is a little bigger than the studied painting. Comparing the Pābāriks of the three studied churches, it was determined that a decorative border was implemented around the angel.

Conclusion
According to the research on the nature of the painting, it can be concluded from the investigations that the studied painting is a marouflage that is pasted on the surface of the wall, and the place of its display was probably a Pabarik in the architectural space of the altar of Maryam Church in Isfahan.

Acknowledgments
The authors thank Tabriz Islamic Art University for providing the technical study of the painting.

 Abstract
During the Safavid period, innovations were created in Stucco decorations. the Koshtehbori Stucco decoration is one of the most attractive and unique architectural decorations of the Safavid period, which was implemented with various motifs in some of the buildings of that period and has a special creativity and innovation that is different from the implementation of other types of Stucco decorations. Knowing the methods and implementation steps of Stucco decorations in restoration projects and studying them is considered as one of the essential elements and an inseparable part of the protection of historical Stucco decorations. The purpose of this research is to identify the similarities and differences, the variety of methods and the stages of implementation of Koshtehbori Stucco decoration with other Stucco decorations in the architecture of the Safavid period. The questions of this research are: What are the similarities and differences of Koshtehbori Stucco decoration with other Stucco decorations in Safavid period architecture in terms of the method and stages of construction and execution? What is the appropriate classification for technical types of Stucco decorations in Safavid architecture? The research method is descriptive-analytical and comparative, and the collection of findings is in the form of library studies and field observations. The results of the studies showed that, unlike other Stucco decorations of the Safavid period, in the execution of the Koshtehbori Stucco decoration, Finishing, polishing, Convex or concavity was not done on the surface of the motifs, and only the background of the design or some carving motifs. In terms of the method, stages and sequence of execution, the Koshtehbori Stucco decoration, is the most similar to the Stucco decoration with carved colored layers. These similarities are in terms of the thickness of each layer of one millimeter and the method of cutting at an angle of 90 degrees to the surface of the motifs and polishing and smoothing the carved parts. Is. Also, in terms of the method, steps and sequence of execution, the Koshtehbori Stucco decoration, is the most different from the carved decoration filled with colored gypsum.
Keywords: Koshtehbori, The Technique of Implementing Stucco Decorations, Classification of Stucco Decorations, Safavid Period Architecture.

Introduction
Stucco decorations in Iran’s architecture have been implemented with different techniques and methods, one of which is the Koshtehbori Stucco decoration. The method and technique of execution of the Koshtehbori Stucco decoration in the Safavid period architecture is different from the Stucco decorations before it and required less time and economic cost per unit area than the relief Stucco decorations of the previous periods. This ornament has a special beauty, it has a variety of colors or different motifs. Previous research by experts in Iranian architecture and art history has focused mostly on Stucco decoration motifs and less on stucco types, comparative analysis of construction methods and techniques. A special classification and understanding of the execution method of Safavid period Stucco decorations can draw more attention to documentation and practical aspects in their basic maintenance and restoration. This research aims to identify the similarities and differences, variety of methods and stages, and execution order of the Koshtehbori Stucco decoration in comparison with other Stucco decorations of the Safavid period, as well as classify the Stucco decorations of this period.
The research questions are: What is the appropriate classification for technical implementation types of Stucco decorations of Safavid period architecture? What are the similarities and differences between the Koshtehbori Stucco decoration and other Stucco decorations of the Safavid period in terms of construction methods and stages? Research method: This research used a descriptive-analytical method to investigate some architectural Stucco decorations in Iran through library studies and field observations. The statistical population of this research includes 6 types of common Stucco decorations in Safavid architecture. The common features and differences between the Koshtehbori decoration and other Stucco decorations of the Safavid period were presented in a descriptive-analytical and adaptive-comparative method in terms of execution methods and stages. For this purpose, common Stucco decorations were examined in terms of the order of executive layers, such as support, scratch coat(arriccio) and fine coat (intonaco) layers, type of background, design drawing and stabilization, plastered layer, and finishing steps. The findings of this research were collected through written and documented sources, as well as field investigations by the authors, including pictures of examples of common Stucco decorations of the Safavid period architecture. In addition to proposing a new classification and naming of some decorations, the research analyzed different types of Stucco decorations by comparing samples to identify similarities and differences between Safavid period Stucco decorations.
 
Discussion
- Presenting a suitable classification of Stucco decoration of Safavid period architecture
This research proposes a new classification system for Stucco decorations in Safavid period architecture based on seven specific criteria. These criteria include the method of shaping, the kind of materials used in the background, the appearance of the surfaces on the motifs, the size and amount of relief, finishing works, in terms of the background and shape of the motifs. Each criterion has a different category, which allows for a more precise identification and recognition of different Stucco decorations. This classification system is crucial for the conservation and restoration of these decorations, as it helps to avoid unprincipled interferences in restoration interventions.
 
- A comparative study of the Stucco decoration of Koshtehbori with other Stucco decorations in Safavid period architecture
In this regard, six different Stucco decorations that were commonly used and innovative during the Safavid period were selected and compared with the Stucco decoration of Koshtehbori in terms of execution method and order. These are:
A: Stucco decoration of Koshtehbori: This decoration, with different techniques and motifs, has been implemented in some buildings of the Safavid period. These decoration are often prepared, designed and implemented with various geometrical, Khataei and Slimy motifs on a background of plaster mortar, which is different from other plaster ornament methods.
B: Stucco decoration with carved colored layers: Among other Stucco decorations in the architecture of the Safavid period, this decoration is the most similar to the Stucco decoration of Koshtehbori.
C: Stucco decoration on Simgel: This decoration is different from the Stucco decoration of Koshtehbori in terms of grouting with mud in the background (empty space between the motifs), the curvature around the motifs, the relief of the motifs, and the shape of the motifs.
D: Stucco decoration on a flat mirror: In this Stucco decoration, flat mirrors are used as a Stucco substrate. In terms of the mirror background between the patterns, the curvature around the patterns, the relief of the patterns, and the shape of the patterns, this Stucco is different from the Stucco decoration of Koshtehbori.
E: Stucco decoration on the Koj mirror (Kopbori): This Stucco decoration is made using the combination of Koj mirror and Stucco parts. This decoration, in an additional stage of initial drawing and transfer of the design, adhesive plaster mortar behind the mirror, in terms of the mirror background of Koj between the motifs, the curvature around the motifs, the relief of the motifs and in the shape of the motifs with the Stucco decoration of Koshtehbori is different.
F: The Naghri Stucco decoration filled with colored gypsum mortar: the Koshtehbori Stucco decoration is the most different from the carved Stucco decoration filled with colored gypsum mortar compared to other Stucco decorations in Safavid period architecture
In the end, the six Stucco decorations of the Safavid period are compared with their sub-groups in the seven classifications in the architecture of the Safavid period. Based on this comparison, we can observe their similarities and differences in the subgroups. For example, the shaping technique of the six types is done in situ, and the type of material used in the background of the Koshtehbori Stucco decoration, the Stucco decoration with carved colored layers, and the Naghri decoration filled with colored plaster is gypsum. However, in the other three decorations with different materials, it is Simgel, flat mirror, and koj mirror.

Conclusion
Through the study and research conducted, a more comprehensive classification and suitable division for Stucco decorations in Iranian architecture has been presented. In this research, Safavid period gypsum decorations are classified based on a specific seven criterion, which includes shaping technique, material used in the background, surface appearance of patterns, size and amount of relief, and complementary works, in terms of both background and pattern shape. Each of these criteria has its own subgroups. 
Stucco decorations in Safavid architecture have similarities and differences in terms of their technical aspects and design. In the execution of the Koshtehbori Stucco decoration, unlike other Safavid Stucco decorations, carving, polishing, convex or concaving on the surface of patterns was not performed, and only the background or some parts of the pattern were carved and polished. In terms of the method, stages and sequence of execution, the Koshtehbori Stucco decoration, is the most similar to the Stucco decoration with carved colored layers. These similarities are in terms of the thickness of each layer of one millimeter and the method of cutting at an angle of 90 degrees to the surface of the motifs and polishing and smoothing the carved parts. Is. Also, in terms of the method, steps and sequence of execution, the Koshtehbori Stucco decoration, is the most different from the carved decoration filled with colored gypsum. Stucco decorations on Simgel, on flat mirrors, on Koj mirrors, in terms of the surface of the motifs, which may be Koj or a combination of Koj and Kav, and also, the type and appearance of the motifs, are different from the Koshtehbori Stucco decoration.