A tiltyard (or tilt yard or tilt-yard) was an enclosed courtyard for jousting. Tiltyards were a common feature of Tudor era castles and palaces. The Horse Guards Parade in London was formerly the tiltyard constructed by Henry VIII as an entertainment venue adjacent to Whitehall Palace; it was the site of the Accession Day tilts in the reigns of Elizabeth I and James I. Henry VIII also constructed a tiltyard at Hampton Court Palace, where one of the towers, known as the Tiltyard Tower, was used for viewing the tournaments below.