The Isa Bey Mosque dates from 1375, a Seljuk sultan Isa Bey I from the Aydinoğlu (son of light, or rather son of Aydin (light), not bad a name) dynasty had it built. It has a large courtyard, with a fine entrance gate, and is much more spacious than the Seljuk mosques in the East (which often are one or two centuries older). It must have been the contact with the West, with its basilica’s, which led to this difference in style.