Sudak was an important well-defended trading centre on the Silk Road from China. Its most impressive sightseeing - Genoese fortress stands on a massive cliff overlooking the town and the Black sea.
It became an important location for trading on the Silk Road in the 12th and 13th centuries, despite attacks by the Kypchaks in the 11th century and further damages inflicted by the Tatars (in 1223, but also in 1239). The Seljuk Anatolian Sultanate of Iconium army and fleet from Sinop held and fortified Sudak in 1224.
More photos, but less synthed can be found here: