The article presents the results of an external examination of the three limestone blocks with bas-reliefs, installed on the Borovitskaya gatetower of the Moscow Kremlin. Images carved on blocks are of: 1) rider with raised sword in his hand on a galloping horse; 2) vertical shapes of a lion with a sword in his paw and serpent (wyvern), both under two closed (imperial) crowns and two-headed eagles with the three - teeth crowns. As a result, the inspection found that the stone blocks set in the original masonry of 1490.