Picton Castle () is a medieval castle near Haverfordwest in the community of Uzmaston, Boulston and Slebech, Pembrokeshire, Wales. Originally built at the end of the 13th century by a Flemish knight, it later came into the hands of Sir John Wogan. The castle and estate are now run by the Picton Castle Trust, a registered charity, and are no longer occupied by Wogan's descendants, the Philipps family (see Baron Milford and Viscount St Davids). It is of unusual construction and has been remodelled several times during its history. The castle is a Grade I listed building and its gardens and park are designated at Grade II* on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales. History Until the late eleventh century, this part of southwestern Wales was part of the Welsh kingdom of Deheubarth. After the death in 1093 of the king of Deheubarth, Rhys ap Tewdwr, in the Battle of Brecon, the Normans took advantage of the lack of leadership among the Welsh, and Norman forces seized much of South Wales. In 1102, following a failed revolt by many of these Normans against King Henry I of England (in favour of Henry's brother, Robert Curthose), the King re-organised the wider region surrounding the Daugleddau Estuary and Milford Haven, including the Penfro peninsula, as a single Marcher Lordship of Pembroke. In 1108, the low-lying land of Henry's mother, Flanders, suffered catastrophic flooding, and many of its inhabitantsFlemingssought assistance from Henry. Henry offered to settle the refugees in the hinterland of the Pembroke Lordship - Haverford (the west of the Daugleddau Estuary) and Dungleddy (the east), thus supplementing his garrison at Pembroke Castle with a compliant and grateful local populace; the number of Flemings so settled far outweighed any local Welsh populace (having a significant genetic impact which lasts to this day). In Dungleddy, the Flemings settled under the leadership of a man named Wizo, who proceeded to build and live at Wiston Castle. Wizo began to grant estates from the land he had been given to his followers, and one such mesne lord was granted the land at Picton, which was three miles to the south of Wiston. This Fleming was not a great historical figure and his name is not recorded. The site chosen for the castle he built may have been on a mound a few hundred yards to the east of