Walter Ullmann FBA (29 November 1910 – 18 January 1983[1]) was an Austrian-Jewish scholar who left Austria in the 1930s and settled in the United Kingdom, where he became a naturalised citizen.
Having a non-Aryan grandfather made it dangerous for him to remain in Austria, so he left for England in 1939 and took up a position at Ratcliffe College, a Roman Catholic boarding school in Leicestershire.
[2] Notable people who studied under Ullmann include Brian Tierney (medievalist), Quentin Skinner, Janet Nelson, and Rosamond McKitterick.
His most successful book was The Growth of Papal Government in the Middle Ages, which deals with the relationship between secular and ecclesiastical power in medieval times.
Ullmann has been credited with "historicizing the concept of the political" in a manner that is relevant for several subfields of the humanities and social sciences.