The "Royal Clock" is located on the upper level of the southern half of the Queen Victoria Building in Sydney, Australia. It was designed by Neil Glasser and made by Thwaites & Reed of Hastings in England, and when activated, displays scenes of English royalty. The plaque on the side of the clock reads "By appointment to Her Majesty Queen Elizabeth II. Turret Clockmakers Thwaites & Reed Ltd Hastings England".
The clock activates on the hour from 9 am until 9 pm. Each performance begins with the music of the trumpet voluntary as miniature trumpeters emerge from the tops of each of the clock's four outer turrets. The trumpeters withdraw at the end of the voluntary. The six scenes are viewed (one at a time) through windows on both sides of the clock that face the railed walkways. Each scene briefly illuminates to display a diorama of English royal history, before dimming and rotating to the left in preparation for the next scene. Most of the scenes include mechanical animation (e.g. the beheading of King Charles I).
The Royal Clock's performance is accompanied by music written by Jeremiah Clarke called The Prince of Denmark's March (commonly known as the Trumpet Voluntary).
The six scenes (in chronological order) depict:
- King Cnut commanding the tide to halt.
- King Harold dying on the field at the Battle of Hastings in 1066.
- King John signing the Magna Carta in 1215. Also present in the scene is Stephen Cardinal Langton.
- Henry VIII and his six wives.
- Queen Elizabeth I knighting Sir Francis Drake aboard the Golden Hind in 1588 (an apocryphal scene as the ceremony was performed by the ambassador from France—in the Queen's presence).
- The execution of King Charles I in 1649.