The Royal Trust Society of Belgium (Dutch: Koninklijke Schenking; French: Donation royale; German: Königliche Schenkung) was a donation to the state proposed in a letter by King Leopold II of Belgium on 9 April 1900.
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.
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.
The Royal Trust also owns woods and land that it rents to private persons and semi-public institutions.