The High Constables of Holyroodhouse are a small corps of ceremonial guards at the Sovereign's official residence in the Scottish capital, Edinburgh. Dating from the early sixteenth century, they now parade whenever the Sovereign, or the Lord High Commissioner of the General Assembly of the Church of Scotland, is in residence. They form part of the Royal Household in Scotland. Their ceremonial uniform includes a blue velvet suit, a hat and a thin sword in a black leather scabbard.