Title: Gregor VII. und Heinrich IV. in Canossa 1077
Subjects: Investiture, History, Church and state, Church history, Foreign relations, Catholic Church, Diplomatic relations, International relations
Places: Holy Roman Empire, Europe
People: Gregory VII Pope (approximately 1015-1085), Henry IV Holy Roman Emperor (1050-1106), Matilde di Canossa, contessa (1046-1115)
Time periods: To 1500, Henry IV, 1056-1106, 11th century