decorative stamps in ilkhanid architecture

in islamic architecture, the architect always tried to decorate the internal and external areas in different ways. one type of these decorations is called brick working, which was current in pre-ilkhanid, ilkhanid period, and after this period. this decoration was used in two ways. in ilkhanid period, the architect used a type of brick which was exactly formed in favorite shapes before baking. the slots between the bricks could be filled by plaster decorative hubs and decorative stamps, such as holy names, flowers, geometric motifs, besides mortar. this kind of decoration was current in seljuk and ilkhanid periods and is visible in monuments such as: mosques, tombs, towers, caravanserais, madrasahs and shrines. in this paper, the writer will explain about the history and origin of decorative stamps during ilkhanid period and their different kinds in used different buildings and their comparison with the earlier period, i.e. the seljuk period.