The Palace of the Academies (Dutch: Paleis der Academiën, French: Palais des Académies) is a neoclassical palace in Brussels, situated on the Place des Palais / Paleizenplein by the Royal Palace of Brussels and the Brussels Park. Today it houses five Belgian academies including the Royal Academies for Science and the Arts of Belgium. In English language context the Academy Palace is also often called Academy House. The rather austere neoclassical Palace and its handsome stables were built between 1823 and 1828 for Prince William of Orange in recognition of his brilliant action on the field at Waterloo, from funds granted by the nation. It was the joint work of two architects, Charles Vander Straeten (1771–1834) and Tilman-François Suys (1783–1861), at a total cost of 1,215,000 florins. The princely family of William of Orange and his princess, Anna Pavlovna (1795–1865), sister of tsars Alexander I and Nicholas I occupied the palace a scant two years before the Belgian Revolution of September 1830 forced them to flee to the Netherlands. From 1830 to 1839 the palace was under sequestration by the newborn Belgian state, and a detailed inventory was drawn up. The public was allowed to tour the palace, and its interiors were considered the most sumptuous that had ever been seen in Belgium. An agreement of 5 November 1842 ceded the structure to the State of Belgium, while the contents, adjudged the personal goods of William, were shipped to his Palace of Soestdijk in the Netherlands. After housing the 1st Regiment of Chasseurs-Carabiniers, 1848–52, and having been refused by the Duke of Brabant when offered him in 1853, the palace remained in use for public festivities. The architect Gustave De Man a member of the Académie Royale de Belgique, was entrusted with transformations, finished in 1862, which fitted the building to house the Musée Moderne.