Barsiyān, the mosque of (masjid-i Barsiyān), is an outstanding architectural monument of the Saljūq era and an illustration of the transformation of mosque architecture in Iran at that period. The mosque is situated in the central part of Iṣfahān district, forty-five km south-east of the city of Iṣfahān and on the north bank of the Zāyandah-rūd.

In mediaeval geographical works, Barsiyān is described as one of the largest villages of the Barāʾān subdistrict. During the Ṣafawid era, owing to its now disappeared lushness and the fertility of the plain s…