Per Levin 1870–1948 Source: Wikimedia Commons People from the Same Era Andrey Arkhangelsky 1879–1940 botanist, geologist, university teacher Ryazan Adolphine Kok 1879–1928 jurist, lawyer Rotterdam Jacques Camescasse 1869–1941 Esperantist Henri Breetvelt 1864–1923 ceramicist, ceramics designer, painter, pottery painter, tile painter Delft Alexandr Korochentsov 1877–1922 military personnel Saint Petersburg Mikhail Chernov 1879–1938 composer Kronstadt