The Royal Trust (, ) was a donation to the state proposed in a letter by King Leopold II of Belgium on 9 April 1900. In addition some properties were added to the donation in a letter of 15 November 1900. The Belgian government accepted the donation by law on 31 December 1903 (Belgian Monitor of 1 January 1904). When the King handed the Congo Free State over to the Belgian government on 28 November 1907, additional properties were added to the Royal Trust (law of 18 October 1908, published in the Belgian Monitor of 18 October 1908). The King donated his properties, such as his lands, castles and buildings, to the Belgian nation. Leopold did not want them to be divided amongst his three daughters, each of which was married to a foreign prince. The donation was made on three conditions: the properties would never be sold, they would have to retain their function and appearance, and they would remain at the disposal of the successors to the Belgian throne. Since 1930, the Royal Trust is an autonomous public institution which operates completely independently (Royal decree of 9 April 1930 - Belgian monitor of 29 May 1930). Properties The Royal Palace of Brussels and the Royal Palace of Laeken are the property of the Belgian State and are not part of the Royal Trust. However the park surrounding the Royal Castle of Laeken and the Royal Greenhouses of Laeken do belong to the Royal Trust. The Royal Trust also owns woods and land that it rents to private persons and semi-public institutions. Used by the Royal Family Belvédère Castle (private residence of King Albert II) Park of the Royal Castle of Laeken Royal Greenhouses of Laeken (used for state receptions etc.) Stuyvenberg Castle (former residence of Queen Fabiola) Villa Schonenberg (residence of Archduchess Astrid) Villa Clémentine (currently the house of Prince Laurent and his family) in Tervuren Ciergnon Castle (holiday retreat) Fenffe Castle (id.) Villers-sur-Lesse Castle (near Houyet, occasionally used as a hunting lodge) Open as public parks (total of 7000 ha) Arboretum in Tervuren Dudenpark / Parc Duden in Forest Elisabethpark / Parc Elisabeth in Laeken Maria-Henriëttepark in Ostend Leopold II-park in Nieuwpoort Koloniale Tuin / Jardin Colonial in Laeken Open to the public Memorial Chapel for Queen Astrid of Belgium, in Küssnacht, Switzerland Japanese Tower in Laeken Chinese Pavilion in Laeken Rented to golf clubs Park and