If I may continue on the subject of the Chateau Laurier extension – this is an interesting article. They don’t mind the modern addition to an existing building but don’t find this proposal quite unique enough. Alas true! Seems Algonquin college designed something quite similar.
Now I do believe the glass addition to the Bank of Canada is quite successful as is the glass addition to the Museum of Nature. The Muchmore school in the Glebe also has a nice addition.