Kārbandi is one of the important elements in Iranian architecture. It is recognized for its successful combination of geometric knowledge and the architectural skill of artists and architects. It is seen as an example of the genius blend of geometry and architecture in Islamic-era Iranian architecture. Kārbandi is also considered one of the techniques used for arch coverings. This structural and decorative element, like other architectural ornamentes, becomes worn and damaged over time. According to studies, the usual approach to its preservation and restoration involves superficial examination and localized repairs without considering its theoretical and practical geometry. The distinction made between Kārbandi and Rasmi-bandi is not highly trusted by restorers, and neglecting the background of Kārbandi leads to differences in form and even structure during restoration planning. Therefore, when beginning any intervention for the restoration of Kārbandi, it is essential to fully identify the related theoretical and practical geometric aspects. With this goal, the present research is developed to critique the restoration of the historic Sedqiani House's Kārbandi, which was carried out in 2013 by the Technical Office of the Islamic Art University of Tabriz. The results show that in the restoration and execution of Kārbandi, alongside geometry, the materials used, the context of its formation, and the desires, taste, and creativity of the traditional architect also play a decisive role.

The preservation and restoration of historical monuments are among the most crucial objectives worldwide, aiming to pass cultural heritage on to future generations. These efforts encompass a wide range of activities carried out by specialists while adhering to various aspects, including the theoretical principles of historical restoration. The Sadiq Al Saltaneh Mansion, located in the Maqsoudiyeh neighborhood of Tabriz, is one of the notable buildings from the Qajar period. In addition to its unique architectural layout, the mansion features stucco decorations on the columns and fireplaces. During the restoration process, evidence from various historical periods was uncovered, highlighting the alterations the building has undergone over time. A significant challenge arose when a historical fireplace in the northwest room of the mansion,s first floor was discovered, along with a stuccoed wall dating back to the late Safavid and early Zand periods hidden behind it. This presented a dilemma regarding how to display both significant historical features. After thorough examination of the site and assessment of the artifacts, it was decided to relocate the fireplace within its original space. The goal was to enhance the understanding of the building and to better showcase both valuable historical elements. Given the historical significance and aesthetic value of both features, the relocation of the fireplace and the subsequent exposure of the historical wall behind it were deemed necessary. The technical process of relocation involved framing and supporting the fireplace, followed by carefully detaching it from the wall according to a pre-designed method. After securing the artifact with an iron frame and clearing the surrounding area, the connection to the wall was severed step by step, with reinforcement measures implemented throughout the procedure. The fireplace was then moved to its new location using a crane and installed in such a way that both features could be fully observed. It should be noted that all actions were planned and carried out based on technical and theoretical principles of historical
monument restoration.