This mosque dates from 1249 and was built for the Seljuk vizier Abdülgazi. Is has fine stonework in its doorways.
This Hacı Kılıç Camii was built by vizier Ebu’l-Kasım bin Ali Tüsî, at the very end of the heydays of the Seljuk sultanate of Rûm. (In fact, their defeat at Kösedağ against the Ilkhanid Mongols happened 6 years earlier, in 1243). The building has two parts: adjacent to the mosque, to its South, stands a medrese/school. Originally the prayer room of the mosque opened directly into the open courtyard of the medrese; now these arches have been closed by glass windows.
The mosque got its actual name in the 16th century, due to a restoration that turned the medrese into a zaviye (dervish house). Hacı Kılıç was a prominent şeyh (= leader) of that dervish Order.
The slender minaret is much younger than the rest (not dated, but probably 19th century).
On the picture: Both entrances (on the left to the mosque’s prayer hall, and on the right to the medrese) are placed in the eastern wall.
Correspondent: J.M.Criel, Antwerpen
Sources: ‘Tarihi Kayseri Cami ve Mescidleri’ – Doç. Ilhan Özkeçeci (1997).