Portions of a chapel remain, dating from the 13th century, and including a porch and a stone altar; while beside it are traces of a tomb hewn out of the slate, and of some domestic building which had a staircase and a pointed arch above the door.
All the arches are pointed and slightly horseshoe, preceding therefore by about two and a half centuries the introduction of the pointed arch into Europe.
In these buildings, as in those of Aquitaine, the pointed arch is the surest sign of Saracenic influence; it must never be looked on as marking the approach of the Gothic of the North.
The actual introduction of the pointed arch took place at a much earlier date, as in the nave arcade of the Cistercian Abbey of Buildwas (1140), though the clerestory window above has semicircular arches.
The pointed arch owes nothing to the Arabs; it is already used in England in early Norman work.