For 10 points, identify this country whose tallest structure is the CN Tower.
One tower in this country features an elliptical floor plan rotated through 180 degrees as it ascends. That building, nicknamed the Marilyn Monroe Tower, forms part of MAD's Absolute World development in this country. In this country, a brown skyscraper with a parallelogram-shaped plan has v-shaped recessions cut into its upper levels. In this country, heraldry-covered octagonal coffers perforate the ceiling of a room whose walls display murals of World War I. That room in this country, the home of [*] Scotia Plaza, is found in the Centre Block, which is topped by the Peace Tower. One tower in this country features the "Space Deck" and "SkyPod" viewing platforms. For 10 points, identify this country whose tallest structure is the CN Tower.
One tower in this country features an elliptical floor plan rotated through 180 degrees as it ascends.
Canada