Clara Zetkin died on 20 June 1933 at Arkhangelskoye , a short distance outside Moscow . As a high-profile communist , friend of Rosa Luxemburg and feminist activist over many decades , Clara Zetkin enjoyed a quasi-iconic status with Moscow power brokers , which now proved to be something of a mixed blessing . Kostja Zetkin found himself in disagreement with government representatives , apparently because of differing opinions concerning the selective publication of some of his late mother 's large collection of articles , essays , letters and other politically relevant papers . Moscow 's epidemic of political disappearances still lay in the future , but Zetkin evidently appreciated that disagreements with the authorities were unwinnable and that he himself was in danger as long as the situation persisted . He applied for permission to emigrate again , this time to Prague to work as a physician . The application was granted , not without some " bureaucratic reluctance " , and in 1935 Kostja Zetkin moved to Czechoslovakia where he remained till 1938
epidemic of political disappearances
Great Purge
Kostja Zetkin