Semyonov, Mikhail Mikhailovich (b.1899). Russian. Medium: watercolour on paper. Date: 1940. The Battle of the Gulf of Riga was a World War I naval operation of the German High Seas Fleet against the Russian Baltic Fleet in the Gulf of Riga in the Baltic Sea in August 1915; Provenance: State Central Navy Museum, St. Petersburg. Photographic Rights held by The Bridgeman Art Library.