NIKOLAYEVSK ON-THE-AMUR. The Tabakh hill on top of which Nevelsky built the Chnyrrakh fort in 1855, to protect the Amur. Photo: O. Kuzmin

NIKOLAYEVSK ON-THE-AMUR. The Tabakh hill on top of which Nevelsky built the Chnyrrakh fort in 1855, to protect the Amur. Photo: O. Kuzmin