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
Holyrood Palace transformed Holyrood into a 20th-century palace. Central heating and electric light were installed prior to his first visit in 1911, and after the First World War improvements to bathrooms and kitchens were carried out. In the 1920s the palace was formally designated as the monarch's official residence in Scotland, and became the location for regular royal ceremonies and events. The present Queen spends one week at Holyrood in summer, during which time investitures are held in the gallery, audiences are held in the morning room, and garden parties are hosted. While she is in residence, the Scottish variant of the