Theodor Anton Blank was a German politician of the CDU. He was one of the founders of the CDU in 1945.
Blank was born in Elz an der Lahn. He was the third of ten children of a carpenter. His family was Roman Catholic. Blank received an apprenticeship as a carpenter. In 1930–33 he worked as a secretary at the Association of Christian transport- and factory employees of the northern and northwestern Ruhr Area. After he was dismissed in 1933 Blank passed his Abitur in 1936 and studied mathematics at the University of Münster and engineering sciences at Leibniz University Hannover. In 1939 he was conscripted to the Wehrmacht and became a first lieutenant at the end of World War II.
From 1949 to 1972 he was a member of the German Bundestag, in which he served from 1965 to 1969 as deputy chief of CDU/CSU-Bundestagsfraktion.
From 1950 to 1955 he served as Special Representative of the Chancellor, leading the "Amt Blank", officially responsible for affairs relating to the Allied occupying troops, but in reality mainly charged by Chancellor Konrad Adenauer with covertly preparing the re-establishment of the German armed forces.