Answer - D - Saint Basil's Cathedral was commissioned by Ivan the Terrible.
	
	Key Takeaway: The Cathedral of Basil the Blessed (also known as Saint Basil's Cathedral) was commissioned by Ivan IV of Russia to commemorate Russia's capture of Astrakhan and Kazan. Constructed on the Red Square in Moscow in 1555, the Cathedral sits in the geometric center of the city and has been the center of the city's growth since its completion. It was the tallest building in Moscow until the Ivan the Great Bell Tower was built in 1600.