Foliejon Park is a manorial country house in the civil parish of Winkfield in the English county of Berkshire. The building has been listed as Grade II since 7 December 1966.
Foliejon was originally known as Belestre, a hunting lodge granted by King Edward I to John Drokensford, Bishop of Bath and Wells, later co-regent for his son, King Edward II. He changed the name of his Berkshire residence to 'Folies Johan,' which in Anglo-Saxon means 'owned by John'. It is mentioned in the 'Rotulorum Originalium Abbreviatio' that "the palaces of Hyremere and Belestre, commonly called folye Johan were taken by the King in 1313 as payment for debts of the bishop and assigned in 1317 to Oliver de Bordeaux for the rent of a red rose with license to surround the estate of Foly Johan and make it a park". The property was inherited by Olivier de Bordeaux's step-son, William Trussell. However, King Edward III, wanting to unify Foliejon with Windsor Great Park, forcibly exchanged it for the manor of Eaton Hastings in the Vale of White Horse in 1359.
Foliejon continued as a Royal estate for the next three centuries, until sold to Serjeant Henne in 1630, who was invested with a baronetcy in 1642. The property was inherited by his son, Henry, in 1667, grandson, Henry, in 1675, great-grandson, Richard, in 1705, and the co-heiresses, Penelope and Alice, in 1710. In 1735, Penelope sold her share to a Mr. Bennett. Lord Henry Beauclerk bought out Mr. Bennet in 1744 and Alice in 1748. In 1771, Foliejon was sold to George Phillips Towry, who sold it to Thomas Bingley in 1800, who, in turn, sold it to William Blane in 1802. William left his estates to Thomas Law Blane, who, in turn, left them to his nephew, Captain Gordon Gilbert Blane, in 1885.