Theodor Schieffer ( born June 11 or July 11, 1910 in Bad Godesberg, † April 9, 1992 ) was a German historian and medievalist. He was Professor of Medieval History at the University of Mainz, later professor at the University of Cologne and since 1952 president of the Society for Middle Rhine church history.
The son of a town council studied from 1929 to 1935 History, Romance and Classical Philology in Bonn, Berlin and Paris. In Bonn he joined the K.St.V. Arminia at the KV. Subsequently, he obtained his doctorate in 1934 with Wilhelm Levison on the subject: " The papal legate in France from the contract of Meersen (870 ) to the schism of 1130 ." In 1935 he became a member of the Monumenta Historica Germaniae. By Paul Kehr and his successor Edmund E. stalk him the independent work of Diplomata Lothar I, Lothar II, Zwentibolds, Louis the Child and the Burgundian kings were transferred; from that employment emerged in 1942 his habilitation thesis " The official documents of the kings of Burgundy ". He moved to the archive service because he had a critical attitude towards National Socialism. In order to achieve an accelerated tenure after the end of the archivist training to Schieffer bent and entered on December 1, 1939 in the NSDAP (member number: 7280318 ). In 1939 he passed the examination and became Archives State Archives Assessor at the Secret State Archives, in 1942 there Staatsarchivrat. After the war, a university career, nothing stood in the way and so he became docent in 1946 with the title of extraordinary professor at the newly founded University of Mainz, in 1951 he became a full professor. A temporary appointment to the Chair Munich by Rudolf von Heckel he refused. In 1954 he moved to the Chair of Medieval and Modern History and Historical Auxiliary Sciences in Cologne. In 1952 he was elected President of the Society for Middle Rhine church history. He became in 1956 a member of the Central Directorate of Monumenta Germaniae Historica in Munich, as well as 1957 in the Historical Commission of the Bavarian Academy of Sciences and in 1964 then in the Rhenish- Westphalian Academy of Sciences and also in 1964 as a corresponding member of the Göttingen Academy of Sciences and since 1969 as a full member. In accordance with his own request, received no Schieffer Festschrift. On 9 April 1992, Schieffer has died in his native town of Bad Godesberg. After his death appeared a small issued by the MGH commemorative volume. His son Rudolf Schieffer was president of the Monumenta Historica Germaniae.