King Doniert's Stone consists of two pieces of a decorated 9th-century cross near St Cleer. The inscription is believed to commemorate Dungarth, King of Cornwall, who died around 875.
The site consists of the remains of two granite cross-shaft fragments dating from the 9th–11th century, and an underground passage and cross-shaped chamber below the crosses, thought to be either the remains of tin workings or a possible oratory. The northern cross, the Doniert Stone, is 1.37 metres high with panels of interlace decoration on three sides and inscription doniert rogavit pro anima carved in half uncial or insular script. The inscription translates as 'Doniert has asked [for this to be made] for his soul['s sake]'.
The inscription is thought to refer to the local ruler Dumgarth (or Dwingarth), who is recorded in the early Welsh chronicle known as the Annales Cambriae as having drowned in around 875 AD. It has a mortise slot and a plinth at the base. It is notable for being the only inscription to a Cornish King also known from documentary sources.
The southern cross, sometimes referred to as the Other Half Stone, is 2.1 metres (6 ft 11 in) high with a panel of interlace decoration on the east face, a broken mortise slot at the top and a plinth at the bottom.
The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.