Ernest Gordon Rupp, FBA (7 January 1910 in London – 19 December 1986 in Cambridge, England). was a Methodist preacher, historian and Luther scholar.
Rupp attended Owen's School in Islington area of London. He studied history at King's College London, theology at Cambridge's Wesley House, and in Strasbourg and Basel during 1936-37.
From 1938-1946 he served as a Methodist minister in New Eltham and Chislehurst (southeast London). He came to public notice in 1945 when he challenged the charge that Martin Luther was the spiritual ancestor of Hitler. The charge was made by Peter F. Wiener in a widely distributed pamphlet, Martin Luther: Hitler's Spiritual Ancestor.[1]
In 1946, Rupp served as the assistant to the Principle of Wesley House. In 1947, he was appointed assistant professor at Richmond College.
Rupp participated in the reconstruction efforts of the World Council of Churches in Europe. In 1947, he visited Berlin, Nuremberg, Stuttgart, Heidelberg, Frankfurt, Hamburg, Bremen and Delmenhorst. During this time, he lectured at the conference of the Methodist church of Northwest Germany.