Sudak or Sudaq is a small historic town located in Crimea, Ukraine situated 57 km (35 mi) to the west of Feodosiya (the nearest railway station) and 104 km (65 mi) to the east of Simferopol, the capital of Crimea. Today it is a popular resort, best known for its Genoese fortress, the best preserved on the northern shore of the Black Sea.
It is believed that the city was founded in 212 AD by Alani settlers on the territory of the Bosporan Kingdom. Greek merchants from the Byzantine Empire founded Σουγδαία (a reference to Sogdia) in the 3rd century. In the 6th century, the Eastern Roman Emperor Justinian I ordered the construction of a fortress. From the 9th century until around the 12th century, there were important trade exchanges between the then Surozh and the Kievan Rus'.