Everyday at 12:00 a shot is fired from a cannon at the Naryshkin Bastion. This custom was introduced under Peter the Great, only in that time it was fired from the Monarch Bastion and signified the beginning or ending of a work shift, or reported the risk of a flood. The tradition of the shot at noon appeared in 1865. In 2000 a new tradition appeared to fire a shot for guests of honour, such as Prince Charles, for example.