Karl Joseph Wirth was a German politician of the Catholic Centre Party who served for one year and six months as the chancellor of Germany from 1921 to 1922, as the finance minister from 1920 to 1921, as acting foreign minister of Germany from 1921 to 1922 and again in 1922, as the minister for the Occupied Territories from 1929 to 1930 and as the minister of the Interior from 1930 to 1931. During the postwar era, he participated in the Soviet and East German Communist-controlled neutralist Alliance of Germans party from 1952 until his death in 1956.

The Centre Party, officially the German Centre Party and also known in English as the Catholic Centre Party, is a Christian democratic political party in Germany. It was most Influential in the German Empire and Weimar Republic. Formed in 1870, it successfully battled the Kulturkampf waged by Chancellor Otto von Bismarck against the Catholic Church. It soon won a quarter of the seats in the Reichstag, and its middle position on most issues allowed it to play a decisive role in the formation of majorities. The party name Zentrum (Centre) originally came from the fact that Catholic representatives would take up the middle section of seats in parliament between the social democrats and the conservatives.