In 1865, Irish immigrant Matthew Gault founded Sun Life Financial in Montreal. The life insurance company constructed this headquarters building at Dorchester Square from 1913 until 1931. When the 24 floor, Beaux-Arts structure was finished, Édifice Sun Life had more square footage than any office building in the British Empire. Sun Life’s main office is now in Toronto. The financial giant is among Canada’s 20 largest public companies with operations across the United States, China, India and other countries.