St Cadwaladr's Church is a Grade I listed church in Llangadwaladr, Anglesey. The church is built in the perpendicular style. The nave is dated to the 12th to early 13th century and the chancel to the 14th. Considerable additions were later made in the mid 17th century, with the north chapel in 1640 and the south chapel in 1661. In 1856 the church underwent restoration, at which time to south porch was added.
In the newer part of the churchyard, south of the church, are war graves of four British airmen and a Polish airman of World War II.
The Gravensteen is a castle in Ghent originating from the Middle Ages. The name means 'castle of the counts' in Dutch. Arnulf I (918–965), Count of Flanders, was the first to fortify this place, building a medieval bastion on this high sand dune, naturally protected by the river Leie and its marshy banks. This bastion consisted of a central wooden building and several surrounding buildings, also in wood.
In the early 11th century, the wooden building was replaced by a stone residence, consisting of three large halls that made up three storeys, connected by a stone stairwell. The monumental stone staircase, the light openings, the fireplaces built into the walls and the latrines were signs of considerable luxury and comfort in those days. There was probably also a tower.