The survival of the mosaic tile arrays of Safavid-era domes in Isfahan has been based on the committed cooperation of craftsmen, architects, and artists in this field. There is a great deal of knowledge and skill, from the baking of tiles and plaster to the artistic execution of mosaic tiles, the preparation and processing of mortar and plaster slurry, and mastery of geometry, concerning the complex process of constructing and restoring the mosaic tile arrays of the domes. Given the historical, spiritual, and aesthetic values of the three domes under study, which are also considered symbols of the city of Isfahan, this research attempts to take a step toward-better protection and preservation of these domes. These studies, relying on the process and evaluation of the restoration of the mosaic tile arrays of these domes from the past to the present, have been carried out to understand and improve the restoration technique and eliminate its problems based on library studies, field methods, and data description and analysis in line with the discussions of dome tile restoration and preventing serious damage in the future. The results of the research show that careful attention to the restoration process and analysis of errors in all stages of tile making, mortar preparation, and tile installation contribute significantly to a principled restoration with minimal errors in the tile arrays of historical domes, and as a result, better protection of these masterpieces. Among the most important factors that are effective in improving the restoration process and preventing the implementation from becoming time-consuming are the existence of a comprehensive restoration plan, a management plan, continuous supervision, forming a group and consulting with experts from various related fields, and avoiding trial and error.
