Three arched portals, lancet windows and an intricate rose window filled with stained glass are three of the Gothic Revival design features of Christ Church Cathedral. This National Historic Site of Canada was built in 1859 and consecrated in 1867. This is the seat for the Anglican Diocese of Montreal. In sharp contrast is the KPMG Tower looming 479 feet in the background. Even more surprising is what lies below the cathedral. Promenades Cathédrale is a huge underground shopping mall consisting of over 60 retailers.