Claass Epp (1803–1865) Claass Epp’s Mennonite Migration Activities in Saratov Wolga Region (1850–1854) Authors: Evseev N. O. The article deals with the history of Mennonite migration in Saratov Wolga Region through the prism of Claass Epp’s activities. The article bases on archival documents and historical sources of personal origin – diaries, letters, memoirs and etc.