The Hunat Hatun Complex is the oldest surviving Seljuk religious site in Kayseri, commissioned in 1238 by Mahperi Hatun, wife of Sultan Alaeddin Keykubad I. It comprises a mosque, a medrese (theological school), a mausoleum containing Mahperi Hatun's tomb, and a functioning hammam. The four elements are arranged together just to the west of the castle, and the complex retains its unity and purpose in a way that many historic sites do not.
The mosque continues to be used for daily prayer, which means entry for non-Muslims is restricted to outside prayer times — go early in the morning or mid-afternoon. The medrese courtyard is typically accessible to visitors and shows the classic Seljuk arrangement of a central court with domed iwans on each side. The carved portal is particularly fine.
The hammam remains operational and can be visited as a genuine public bath, which is the most direct way to connect with the complex's living tradition. The tomb of Mahperi Hatun, a twelve-sided structure in the northeast corner, contains her sarcophagus and is open to visitors.