Kashan's ancient citadel, known as Qal'ah-i Jalali, is located in the southwest corner of the old city, and was once part of a larger system of fortifications that included city walls. The structure dates to the Seljuq period and is attributed to Sultan Malik-Shah I (r. 1073-1092/465-485 AH). Today, the remains consist of a double enclosure wall in the form of a dodecagon. The interior has given way to cultivated lands. One noteworthy feature of the citadel are the remaining domed ice houses (yakchal) that have survived from early modern times.
Beheshti, Oxana. Travel Guide to Esfahan, Kashan and More, 164. Tehran: Rowzaneh Publication, 2003.
Nārāqī, Ḥasan. Āsār-i tārikhī-i shahristānhā-yi Kāshān va Naṭanz, 120-124. [Tehran: Anjumān-i āsār-i millī, 1348/1969].