At the Karl-Mark-Hof, a block of council flats in Döbling (19th district of Vienna) is a memorial plaque for Karl Mark with the following inscription:
Karl Mark
1900 - 1991
Social Democrat and educator of the people
1945 district head of Döbling "BURGOMISTR"
Member of Parliament and Member of the Council of Europe
Chairman of the Association of Viennese People's Education
Founder of the Vienna Volksbildungswerk (community-based branch of Adult Education)
About the person:
Karl Mark (born August 1, 1900 in Vienna, † January 24, 1991 ibid) was an Austrian politician (SPÖ) and Member of Parliament
After the attendance of the academic high school and the Döbling high school Karl Mark studied some semesters of law and political science at the University of Vienna and was from 1921 until the prohibition of the social-democratic party 1934 district secretary of the party in Döbling. Mark was one of the leading representatives of the "Linken in der SDAP" (The left of the Social Democratic Workers' Party), the wing of the party around the future Communist Ernst Fischer. After the armed uprising of Social Democratic and Communist workers on February 12, 1934 Mark was temporarily interned in police custody and in the camp Wöllersdorf. On April 10, 1945, he reported to the Russian commander in Döbling, according to his own statements, to campaign for the concerns of the district. After he had given the acquaintance of the Communist Ernst Fischer as a reference, Mark was summarily appointed by the army commander to the district chief of Döbling. With twelve party friends, six representatives of the parishes and two liberals, he then organized a district administration. Mark, however, remained only until October 1945 district chiefs of Döbling, but held until 1970, the office of the district party chairman. From December 1945, Mark represented the SPÖ (Social Democratic Party of Austria) in the Parliament (until 1966) and was Secretary General of the League of Politically Persecuted 1946-1948.
Translated from source: de.wikipedia.org/wiki/Karl_Mark