Born Dec. 11, 1895, in Leipzig; died Mar. 13, 1961, in Paris. One of the leaders of the ultra-left faction of the Communist Party of Germany in the mid-1920’s.
After seizing the leadership of the party in 1925, Fischer and the other representatives of the dogmatic sectarian group expressed opposition to a united proletarian front and neglected work within the trade unions. In the fall of 1925, Fischer and her adherents were removed from the leadership, and in 1926 she was expelled from the party for factional activities.