The Cathedral of the Protection of Most Holy Theotokos on the Moat or Pokrovsky Cathedral are official names for a Russian Orthodox church in Red Square in Moscow. The church is also called the Cathedral of St. Vasily the Blessed, anglicized as Saint Basil's Cathedral. It was built from 1555–61 on orders from Ivan the Terrible and commemorates the capture of Kazan and Astrakhan.
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