The "Khorasani style" (Persian: شیوه معماری خراسانی) is a style (sabk) of architecture when categorizing Iranian architecture development in history. It is the first style of architecture appearing after the Conquest of Persia, but is highly influenced by pre-Islamic designs. Landmarks of this style appear in the late 7th century, and span through the end of the 10th century CE.
Examples of this style are Mosque of Nain, Tarikhaneh-i Damghan, and Jame mosque of Isfahan
Mosque of Nain: Na'in has one of Iran's oldest mosques still standing.
Ardestan Congregation Mosque