The Mosalla of Paein Khiaban of Mashhad is one of the largest and most beautiful historic mosallas in Iran, built at the order of King Suleiman I during the Safavid era. according to inscription on the tile of the central porch, the date of construction and completion of the building is 1087 A.H. The architectural structure of the building consists of a high central porch in the middle and two domed porticoes on the sides. Both the internal and external surfaces of the building are decorated with various architectural elements, such as stucco work, tile work, painting and muqarnas. Among the various decorative employed in this structure, the mosaic tiles of the mihrab are unparalleled in terms of beauty and sophistication. Laboratory analysis of the chemical composition of the glaze of the altar tiles using SEM-EDX method demonstrated strong agreement with findings from other researchers, indicating a continuity of the tile-making tradition and glaze production with similar technology throughout the Safavid era across various r regions of Iran. A petrological study of the mineral composition of the body of the tiles also revealed the use of a similar and appropriate mineralogical composition, paired with good firing in their production, which contributed to the strength and durability of the tiles. The pathology of the building and its decorations indicated that a combination of different physical, chemical and human factors caused the destruction and erosion of the structure and its decorations, including the mosaic tiles. Among these, human activities and irregular urban development surrounding the building, along withimproper and careless restorations, played the main role in the destruction and erosion of the tiles. Considering the importance and sophistication of the mosaic tiles of the altar, following laboratory studies, the tiles of this part of the building were conserved and restored. For this purpose, after the primary conservation measures through cleaning and consolidation, the missing parts were restored according to the principles and theoretical foundations of restoration in the method of complementary restoration through color-matching.

Due to the instability and sometimes sensitivity of archaeological objects, conservation and restoration of them usually require a complex procedure along with basic studies and pathology in the restoration process. Since pottery objects are more stable than other objects, they can be restored after preliminary investigation regarding the level of strength and hardness of surface sediments, if there is no special problem. In this report, we introduce and describe the conservation and restoration process of a number of Zanjan salt men collection pottery, transferred from the Zulfiqari Museum of Zanjan to the pottery department of the Research Center for Conservation of Cultural Relics for conservation and restoration operations. These objects, which were sometimes cleaned and temporarily patched at the excavation site, were thoroughly checked and all connections were opened. The parts were cleaned separately using various mechanical and chemical methods and after finding the correct parts, the connection was made again. Finally, the parts that needed to be reconstructed were reconstructed with plaster following the pattern designed for this collection and considering the basics of restoration.

The ceramic objects are one of the most important evidence of the Neolithic era. Due to the physical and mechanical damages, they need proper conservative strategies. The reconstruction of historical ceramic objects with a large number of missing parts has been a challenge for conservators. The importance of this matter is owing to the historical, technological, and aesthetic values of objects. So, their conservation and reconstruction must be in line with the conservation protocols to conserve their integrity. In this paper, we describe reconstructing process of a historical ceramic object belonging to the Neolithic period recovered from Silve Tepe in Piranshahr City in the northwest of Iran. In this process, we are trying a new method for casting on a sample with numerous missing parts. After preliminary studies of the sample, the reconstruction of it is described.

The Tepe Silveh site is one of the ancient sites in the Piranshahr region. During excavations conducted in 2015, several terracotta pots were uncovered. The purpose of this project is to restore and protect two terracotta artifacts belonging to this site, This project is therefore of great importance Silweh hill has been completely destroyed in the exploitation plan of Silweh dam and these pottery are the only remaining information from this ancient site. The project aims to prevent further damage to these artifacts in the future by adopting the most appropriate  conservation methods.These pottery pieces were found in a very poor and unstable condition, and immediate strengthening was among  the most essential initial measures. After conducting the necessary comparative historical studies, efforts were made to adopt the most efficient intervention methods. These pottery were found in a very disorderly and unstable condition, and immediate strengthening was among the most essential initial measures. After conducting the necessary comparative historical studies, efforts were made to adopt the most efficient intervention methods.

This article examines and identifies the tombstone of the late Seyyed Rouhollah Kashfi Darabi and discusses how to carry out its restoration, reconstruction, and display. The necessity and importance of this research is the attention to the conservation and restoration of outdoor stone artefacts in the museum that are exposed to environmental factors in open areas. This has been accomplished through laboratory studies identifying stones using petrographic methods and examining similar past experiences in the region through field and library research. After documenting, analyzing, and evaluating the intervention and reconstruction methods, the incomplete interventions of previous restorations were cleaned up and rectified. In continuation, the reconstruction of the tombstone was carried out using silicone molds and polyester resin. The restoration intervention was done by examining and comparing various reconstruction methods for such works and the less-considered idea was innovatively implemented by reconstructing the missing parts with polyester resin (simulating marble stone) while considering technical and aesthetic principles. Finally, conservation and restoration measures were carried out using 4% Paraloid B-72 as a coating-stabilizer and it was entrusted to the technical office of Tabriz Islamic Art University with arrangements for display and conceptual space. Despite the positive aspects of the reconstruction measures in terms of technical and aesthetic principles, due to the location of the artifact in the outdoor environment and exposed to destructive environmental factors, follow-up researches are needed to investigate the behaviour of stone and restoration materials.

Lacquer paintings hold not only historical significance but also aesthetic value. The motifs and materials used in these artworks can vary depending on the cultural context of the society. Examining these types of works can provide valuable insights into the culture, economy, technology, and native materials of different ethnic groups. Lacquered paintings are considered highly valuable and require careful conservation measures. The purpose of this report is to present the protective process carried out on a lacquered bookbinding from the Qajar era. The initial investigation revealed the need for consolidation, separation of the leather from the bookbinding, surface cleaning, patching, restoration of the corners, priming, coloring, and final coating. To achieve this, the following materials and methods were employed: 5% Plextol for consolidation, a mixture of tissue paper pulp with gelatin and marble dust as a putty to restore the corners, a combination of HV360 adhesive with distilled water and marble dust for the primer layer, acrylic paint for coloring, and a final 3% polyvinyl butyral layer for further protection of the paint layers.

Caucasus is the region between the Caspian and Black seas. The Caucasus Mountains divide it into northern and southern parts. The North Caucasus is a part of Russia where has seven autonomous republics and two krais. From the east, the republics are: 1- Dagestan, 2- Chechnya, 3- Ingushetia, 4- North Ossetia, 5- Kabardino-Balkaria, 6- , Karachay-Cherkessia, and 7- Adygea, and the krais are Krasnodar Krai and Stavropol Krai. South Caucasus also includes 3 countries, the Republic of Azerbaijan, Armenia and Georgia. This text describes a research trip to Derbent, Dagestan. The goal was to find and prepare identity card from Persian inscriptions and some buildings with inscriptions in this city. Derbent is a small coastal city that was separated from Iran by the Golestan Treaty. This city has 150 registered artifacts and about 100 Persian inscriptions (Pahlavi and Dari Persian) from the Sassanid, Safavid, and Qajar periods. Juma Mosque in Derbend, after Narin Castle and Hesar, is the most important heritage work in the city of Derbend, which has always been
the focus of regional governments, so it has valuable inscriptions from the Mongol, Turkish, Arab and Iranian governments. The mosque's 1330-year-old age, as well as its architectural style, were the criteria for registering this valuable work under the Derbend World File in UNESCO.

In this research, considering the necessity of conservation and restoration of wooden doors and their significance in Iranian architecture, as well as understanding the structure of historical wooden artifacts, necessary actions were taken to study, restore, and conserve a two-leaf wooden door belonging to the ivan of Sukiass house in Isfahan. Following preliminary damage assessment, various tests (including pH testing, colorimetry, equilibrium moisture content measurement, species identification, and Fourier-transform infrared spectroscopy) were conducted on the study sample. The results indicated the acidic nature of the structure of the sample under study, minimal color changes before and after the restoration process, standard equilibrium moisture content, the use of Oriental Plane tree wood (Platanus orientalis L) in the construction of the artifact, and the absence of significant structural damage on the sample surface. Historical wooden artifacts are typically classified into three main categories of physical, chemical, and biological damages. The study sample exhibited physical damages such as abrasion, cracking, and microcracks, environmental temperature effects resulting in color changes on the artifact,s surface, as well as the impacts of dust and debris. In the chemical damage category, tissue acidification in the artifact was observed, along with noticeable impacts of pollution. Biological damages caused by insect infestations, categorized under wood biological damages, were visible as multiple
boreholes on the artifact,s surface. Additionally, the presence of a burnt section at the lower part of one of the door leaves is another damage incurred by the study artifact. In line with conservation and aesthetic principles, necessary measures include cleaning the door and its frame, addressing deficiencies and cracks, protecting the artifact from pests, and applying polish and acid treatment.

In this report we wanted to remind parts of principles and methods of conservation and restoration of pottery objects, and to present reconstruction process of two large pottery Jar (Khomreh) belong to Sassanian period during a written and illustrated report. also, we explained the difference created when choosing materials and methods. The jars were obtained from excavating Varamin Plain by Dr. Morteza Hesari in 2017. They were restored at the conservation pottery workshop of the Research Institute of Cultural Heritage & Tourism Research center for conservation and restoration of relics (RCCCR).

The "Illustrated Atlas of Pathology of Historical-Cultural Textiles" by Fatemeh Alimirzaei and Shahrzad Aminshirazi is specially designed for conservators,
restorers, students, museum curators, and collectors handling different categories of textiles. The book is divided into three chapters, addressing the pathology of historical textiles from three perspectives: physical-mechanical, chemical, and photochemical. However, the distinction of photochemical from chemical is rejected as unjustified since photochemical reactions are a subtype of chemical reactions induced by photons. A more suitable third type could be biological effects, which involve harm inflicted with the help of living organisms, including microbes, rodents, and insects.

This research investigates methods for conservation, restoration, and reinforcement of the Urartian inscription of Seqindel. It also aims to propose feasible recommendations for improving the preservation and stabilization conditions of the inscription and consequently, the historical site itself. The Seqindel inscription was discovered in 1951 CE near the village of Seqindel, beside a complex archaeological site. It stands as a significant artefact from the Urartian era in northwest Iran, dating back approximately 2750 years. Stone inscriptions are inherently vulnerable to environmental factors that can lead to deterioration. To address this concern, the research incorporates structural studies, pathology assessments, and analyses of the inscription's current condition. The results indicate that priority should be given to emergency stabilization and consolidation to prevent the collapse of the inscription, followed by practical measures for ongoing protection, and finally, preventive conservation. Considering the inscription's location approximately 2 kilometers from the village of Saqindel, the following key recommendations are proposed for its preservation and promotion: 1) Community participation in protection efforts, 2) Tourism enhancement and deterrence of unauthorized excavations, 3) Road construction for improved accessibility,4) Site access and signage development, 5) Natural stone staircase construction, 6) Design and insulation of informative signage, 7) Vegetation revitalization in the adjacent valley.