The Peace Tower was designed by architect John A. Pearson not only to stand as an architectural feature and landmark, but also to function as a memorial to Canadians who had given their lives during the Great War. It thus houses the Memorial Chamber, a vaulted 7.3 m by 7.3 m (24 ft by 24 ft) room directly above the porte-cochere, with stained glass windows and various other features illustrating Canada's war record, such as the brass plates made from spent shell casings found on battlefields that were inlaid into the floor, and bore the name of each of Canada's major conflicts during the First World War. Stone that architect John Pearson personally collected from the main European battlefields where Canadians were killed is included in the floors and walls. Pearson described the room, also called the Memorial Chapel, as a "sacred grove in the middle of the forest."