Vassian Patrikeyev (; – between 1531 and 1545), also known as Vassian Kosoy (; real name
Prince
A prince is a male ruler (ranked below a king, grand prince, and grand duke) or a male member of a monarch's or former monarch's family. ''Prince'' is also a title of nobility (often highest), often hereditary, in some European states. The ...
Vasily Ivanovich Patrikeyev), was a bishop of
Rostov
Rostov-on-Don is a port city and the administrative centre of Rostov Oblast and the Southern Federal District of Russia. It lies in the southeastern part of the East European Plain on the Don River, from the Sea of Azov, directly north of t ...
and confidant of
Ivan III of Moscow
Ivan III Vasilyevich (; 22 January 1440 – 27 October 1505), also known as Ivan the Great, was Grand Prince of Moscow and all Russia from 1462 until his death in 1505. Ivan served as the co-ruler and regent for his blind father Vasily II befo ...
. Vassian was an