After John Pearson canvassed British artists in stained glass for designs for the Memorial Chamber's windows, he settled on Frank S.J. Hollister of Toronto for the task; Hollister's proposal was presented in 1925 to the Department of Public Works for the Governor-in-Council's approval. Each of the three 7 m by 3.5 m windows is divided into vertical quadrants by stone mullions and contain allegorical figures amongst heraldic symbols, including the Royal Arms of Canada, the arms of each of the provinces, and those of the United Kingdom.