The Russian Orthodox Diocese of Sourozh is a diocese of the Russian Orthodox Church (ROC), covering the islands of Great Britain and Ireland. Since 28 December 2018, the Diocese of Sourozh is part of the Patriarchal Exarchate in Western Europe.

Sudak is a town, multiple former Eastern Orthodox bishopric and double Latin Catholic titular see. It is of regional significance in Crimea, a territory recognized by most countries as part of Ukraine but annexed by Russia as the Republic of Crimea. Sudak serves as the administrative center of Sudak Municipality, one of the regions Crimea is divided into. It is situated 57 km (35 mi) to the west of Feodosia and 104 km (65 mi) to the east of Simferopol, the republic's capital. Population: 16,492 .