Buckingham Palace, located in Westminster City, London, is the official residence of the UK's sovereign. The expression Buckingham Palace or simply The Palace has become common to express everything about the court and royal family environments. In addition to being Queen's official residence, Buckingham Palace is the place where numerous public ceremonies are held, and is also a notable tourist attraction (world-famous is the change of the Guard) The building was built as a large courtyard of square honor, with Buckingham House in the center. The façade of the new building was built in Bath stone, with exquisite French neoclassical details. This palace is very similar to today's, but without the big east wing in front of the Mall, which now closes the quadrilateral. Where the east wing now stands, there was a triumphal marble arch of Ravaccione between the two outer wings, modeled on the style of the Arch of Constantine in Rome. This arc, for the construction of which 34,450 pounds were spent, served as a representation. According to Giorgio IV's intention, he had to have at his head a bronze equestrian statue representing him, but at his death the statue had not yet been terminated and when Parliament, although reluctant, had to settle the bill, decided to transfer it to Trafalgar Square. At the death of William IV, the rising cost of the unfinished palace created one. It is interesting to note that when the palace of Parliament was destroyed by fire in 1834, the king offered the then incomplete palace as the seat of government, an offer which suggests that he was less interested in the palace than his brother. Parliament declined the offer, and the palace was rebuilt. Many of the smaller representative rooms were furnished in this era, in the Chinese regency style, and many furniture, furnishings and fireplaces were carried out by the Royal Pavilion of Brighton and Carlton House, the Giorgio IV palaces after the death of the latter. Giorgio V's wife, Queen Maria was an art director and she was interested in the real collection of furniture partly by restoring it and partly by expanding it. Mary installed new facilities and included furnishing accessories, such as Benjamin Vulliamy's two emperor fireplaces dating from 1810, in the Bow Room on the ground floor, the enormous low room at the center of the façade overlooking the garden. Queen Mary also decorated the Blue Room. This room, formerly known as the South Room, has one of Nash's most beautiful ceilings, coffered with huge golden panels and is defined by historian Olwen Hedley in his book Buckingham Palace as the the most beautiful of the palace, the most majestic and superb even of the throne hall or ballroom, built to take on the original function of the Blue Room. Another change was implemented in 1938 when the northwest pavilion, designed by Nash, was transformed into a pool. In 1999 it was declared that the building contained 775 rooms, including 19 guest rooms, 52 main bedrooms, 188 serviced rooms, 92 offices and 78 bathrooms. In total 108 meters is 120 meters and is 24 meters high. If all this seems to be enormous, it is small compared to the Tsar's Palace in St. Petersburg, Tsarskoe Selo, the Vatican Apostolic Palace and the Quirinale Palace in Rome, at the Royal Palace of Madrid or the Louvre, and tiny compared to Forbidden City of Beijing or Potala Palace. Its relative smallness can be best appreciated from the inside when you look at the courtyard.