Investiture II or another member of the royal family each year. A list of those to be honoured is published twice a year, in either the New Year Honours or the Birthday Honours. Approximately 25 investitures are held annually: most in the Ballroom at Buckingham Palace, although the Waterloo Chamber in Windsor Castle and the Palace of Holyroodhouse in Edinburgh, Scotland, are also used. In 2014 The Prince of Wales held an investiture at Hillsborough Castle in Northern Ireland. Investitures are also held in other Commonwealth realms, when the Governor-General acts on behalf of the Queen. The poem "The Investiture" by
Palace of Westminster rooms and bars; the first floor (known as the "principal floor") houses the main rooms of the Palace, including the debating chambers, the lobbies and the libraries. The top-two floors are used as committee rooms and offices. Some of the interiors were designed and painted by J. G. Crace, working in collaboration with Pugin and others. For example, Crace decorated and gilded the ceiling of the Chapel of St. Mary Undercroft. Instead of one main entrance, the Palace features separate entrances for the different user groups of the building. The Sovereign's Entrance, at the base of the Victoria Tower, is