A tiny 14th-century chapel tucked inside the Caer Gybi Roman walls, beside St Cybi's parish church. The name translates as "the church of the grave," referring to a tradition that the Irish chieftain Serigi, killed by St Cybi's relatives, was buried here. Whether or not that story has any basis, the building itself is genuinely medieval and one of the smaller intact chapels in Wales.
For most of its life it served as a chantry, and later as the parish school. The simple lancet windows, the plain stone walls, and the modest belfry have escaped over-restoration — it is in essentially its medieval form.