The Cathedral of Vasily the Blessed, commonly known as Saint Basil's Cathedral, is a Russian Orthodox church in Red Square of Moscow. It is one of the most popular cultural symbols of Russia. The building, now a museum, is officially known as the Cathedral of the Intercession of the Most Holy Theotokos on the Moat, or Pokrovsky Cathedral. It was built from 1555 to 1561 on orders from Ivan the Terrible and commemorates the capture of Kazan and Astrakhan. It was completed, with its colours, in 1683.
The original building, known as Trinity Church and later Trinity Cathedral, contained eight chapels arranged around a ninth, central chapel dedicated to the Intercession; a tenth chapel was erected in 1588 over the grave of the venerated local saint Vasily (Basil).