Escher in the Palace one's eyes will be tricked by multiple interactive displays. In the rooms of the museum are fifteen chandeliers made by the Rotterdam artist, Hans van Bentem. The artist designed these especially for the museum, with some references to the work of Escher and the Palace. In the ballroom, a star chandelier is endlessly reflected in the two mirrors. In other rooms there are chandeliers such as a shark, a skull, spiders, and a sea horse. The parquet floor in the Palace was designed in 1991/92 by the American minimal artist Donald Judd on the occasion of the opening of the
Buckingham Palace walk and a further curtsey, while manoeuvring a dress train of prescribed length. The ceremony, known as an evening court, corresponded to the "court drawing rooms" of Victoria's reign. After World War II, the ceremony was replaced by less formal afternoon receptions, usually omitting curtsies and court dress. In 1958, the Queen abolished the presentation parties for débutantes, replacing them with Garden Parties, for up to 8,000 invitees in the Garden. They are the largest functions of the year. The boy Jones was an intruder who gained entry to the palace on three occasions between 1838 and 1841. At least