Moscow's St. Basil's Cathedral is an iconic church located in Red Square, Russia. Built between 1555 and 1561, it was commissioned by Tsar Ivan the Terrible to commemorate the capture of Kazan. The cathedral is famous for its colorful, onion-shaped domes and unique architectural style, which combines elements of Byzantine and Russian design. The structure consists of eight chapels arranged around a central nave, with the ninth chapel dedicated to St. Basil the Blessed. Over the years, it has become a symbol of Moscow and a UNESCO World Heritage site, attracting millions of visitors each year.