Kingston City Hall. I love this portrait for its verisimilitude: the soldier is smoking, he's tired, and he's unhappy. This is probably a fairly accurate portrait of the Canadian soldiers at Vimy, but stained glass is usually more idealized.
I was reminded of similar stained glass at both Toronto's Osgoode Hall and University of Toronto's Soldier's Tower: I thought at first it might be the same artist, but I think it's just because they were all created in the same period, right after the First World War.