Introduction to Cannon King: Cannon King is also known as "Russian Gun". This ancient copper-cast cannon was built from 1540 to 1586. It weighs 40 tons, is 5.34 meters long, has a caliber of 0.89 meters, and a muzzle Three people can climb in at the same time. Displayed in front of the cannon are four cannonballs stacked together, each weighing two tons. There are also exquisite reliefs on the gun carriage, including a statue of Tsar Fedor, which is placed near the Ivan Bell Tower together with the Bell King as a famous cultural relic for visitors to appreciate.