The Christian Democratic Union of Germany was an East German political party founded in 1945. It was part of the National Front with the Socialist Unity Party of Germany (SED) and a bloc party until 1989.

The German Democratic Party was a liberal political party in the Weimar Republic, considered centrist or centre-left. Along with the right-liberal German People's Party, it represented political liberalism in Germany between 1918 and 1933. It was formed in 1918 from the Progressive People's Party and the liberal wing of the National Liberal Party, both of which had been active in the German Empire.