Context view, looking northwest, showing St Basil's at center with the Kremlin at left; In 1553-1554, at the command of Ivan IV (reigned 1533-1584), the stone church of the Trinity on the Fosse (Troitsa na Rvu) was built in Red Square to commemorate the capture of Kazan. It had seven wooden chapels. In 1555-1561, however, the new brick cathedral of the Protective Veil on the Fosse (Pokrov na Rvu), attributed to the architects Barma and Postnik, was built with eight stone chapels symmetrically arranged on a common foundation around this central part. Another chapel was built in the north-east corner over the grave of the ‘holy fool’ of Moscow, Basil the Blessed (Vasily Blazhenny), in 1588, since when the cathedral has been popularly known by...