information:classification, stylistic:style_transfer
Medieval period

The Turkic peoples first captured Smyrna under the Seljuk commander Çaka Bey in 1076, along with Klazomenai, Foça and a number of the Aegean Islands. Çaka Bey (known as Tzachas among the Byzantines) used İzmir as a base for his naval operations. In 1097, the Byzantine commander John Doukas recaptured the city and the neighboring region. The port city was then captured by the Knights of St John when Constantinople was conquered by the Crusaders during the Fourth Crusade in 1204, but the Nicaean Empire would reclaim possession of the city soon afterwards, albeit by according vast concessions to their Genoese allies who kept one of the city's castles and the lordship of the towns of Old Phocaea and New Phocaea (now part of the İzmir Province) from 1275 to 1340.

Smyrna was captured again in the 14th century by Umur Bey, the son of the founder of the Beylik of Aydın who first took the upper fort of Mount Pagos (thereafter called Kadifekale), and then the lower port castle of Neon Kastron (called St. Peter by the Genoese and as "Ok Kalesi" by the Turks). As Tzachas had done two centuries before, Umur Bey used the city as a base for naval raids. In 1344, a coalition of forces coordinated by Pope Clement VI took back the lower castle in a surprise attack in the Smyrniote crusades. A sixty-year period of uneasy cohabitation between the two powers, the Beyliks holding the upper castle and the Knights the lower, followed by Umur Bey's death in 1348.