Basilica of Our Lady Immaculate is a Roman Catholic minor basilica and parish church located in Guelph, Ontario, Canada. A Gothic Revival style building designed by Joseph Connolly. It is considered Connolly's best work. To serve a Roman Catholic parish of predominantly German settlers the church was built between 1875 and 1883. The monumental church contains decorative carving and stained glass executed by skilled craftsmen. The church was designated a National Historic Site of Canada in 1990. Pope Francis designated the church a basilica on 8 December 2014.