Sultan İsa (Zinciriye) Medresesi

Dating from 1385, this medrese (seminary) complex's highlight is the imposing recessed doorway, but make sure you wander through the pretty courtyards and visit the small mosque with its ornately carved mihrab (niche indicating the direction of Mecca). Arrive before 4pm if you want to head onto the roof to enjoy the cityscape as the guardian often locks it after then.