He became a Canadian citizen in late 1945 .
After working briefly for an architectural firm in Toronto , Seidler ( at the age of 21 ) became a registered as an architect in Ontario , Canada in February 1945 .
Seidler became a Canada citizen in late 1945 .
After working briefly for an architectural firm in Toronto , Seidler ( at the age of 21 ) became a registered as an architect in Ontario , Canada in February 1945 .