Saint Basil's Cathedral (or Pokrovsky Cathedral), Red Square, Moscow
St. Basil's marks the geometric center of Moscow. It was erected on Czar Ivan the Terrible's order in 1555-1561 to commemorate the taking of Kazan and the conquest of the Astrakhan Khanate. It has been the hub of the city's growth since the 14th century and was the city's tallest building until the completion of the Ivan the Great Bell Tower in 1600.