ISA BEY MOSQUE
Isa Bey Mosque, situated on the outskirts of the Ayasuluk Hill and on the western slopes of Basilica of St. John, dates from Selcuk period. It was constructed during the reign of Isa Bey in 1375.
It is the oldest known example of Turkish mosques with a courtyard and Anatolian columned mosques. The edifice displays common Selcuk architectural elements in its decoration techniques and in the monumental portal.