Captured by American soldiers during the Battle of York in 1813, the first Mace of Upper Canada was displayed at the US Naval Academy Museum until it was returned to Ontario in 1934. It is currently on display at the Legislative Assembly of Ontario.

The Mace represents the authority of the Crown and must be present in the Legislative Chamber in order for the Assembly to conduct its business. The Sergeant-at-Arms is responsible for ushering it in and out of the Chamber each day that the House is in session.