The town contains a large number of late-medieval Islamic buildings in the form of mosques, madrassas, and tombs. Also commercial buildings such as "Han's Caravanserais. Commissioned mostly by its local Kurdish rulers, the architectural style of these buildings is very conservative and similar to much earlier Seljuq-period structures. Important monuments include the 12th-century Ulu Mosque with its 15th-century minaret, and the Gokmeydani Medresesi and Sherefiye Mosque from the sixteenth century. Until 1915 there were five Armenian monasteries and several churches in Bitlis – only a 19th-century Armenian church survives, now used as a warehouse.