Dillon Hall was designed by Albert Lothian and completed in 1927. It was also known as the Classroom Building and was used by high school and college students until 1957, when a new Assumption High School was built on Huron Church Road. It was also sometimes known as the Arts Building; it was officially named Dillon Hall in 1957, in memory of the Reverend Daniel Leo Dillon, C.S.B. He served 2 terms as President of Assumption College: from 1922-1928 and then from 1931-1932.