Boniface of Brussels was a 13th-century Catholic bishop and Cistercian monk who was born in Ixelles in 1183. After studying at the University of Paris, he gained recognition as a lecturer of dogma and taught at the cathedral school in Cologne. He was appointed Bishop of Lausanne in 1231, a position he held until 1239. Known for his integrity, he famously challenged both corrupt clergy and the Holy Roman Emperor, Frederick II, which eventually led to an assault on him by imperial agents.