Coordinates: 53°07′58″N 3°48′04″W / 53.1328°N 3.8010°W
Gwydir Castle is situated in the Conwy valley, Wales, a mile to the west of the ancient market town of Llanrwst and 1.5 miles (2.4 km) to the south of the large village of Trefriw. An example of a fortified manor house dating back to c1500, it is located on the edge of the floodplain of the river Conwy, and overlooked from the west by the now-forested slopes of Gwydir Forest.
There has been a fortification of some sort on the site since AD 600, and in the Middle Ages a large number of skirmishes were fought in this area between the various rival Welsh princes and their forces, the most significant being in 610 and 954.
By the 14th century some form of manorial house had evolved, and the first recorded owner was Howell ap Coetmor, who fought in the Hundred Years' War and was a commander of longbowmen under Edward, the Black Prince at the Battle of Poitiers in 1356.
Gwydir became the ancestral home of the powerful Wynn family, descended from the Kings of Gwynedd, and one of the most significant families of north Wales during the Tudor and Stuart periods.