The first church at Llandefalle was probably established around 500 AD and was dedicated to St Maelog, and you can often find the current church mentioned with that dedication. That first church was rebuilt in stone around 1300 AD, and was substantially rebuilt in the late 15th century.
Unlike many churches in the area it largely escaped Victorian restoration, so retains its 15th century character throughout, with the exception of the upper part of the tower (1661) and south chancel windows from 1700.
During the Middle Ages the church was owned by Clifford Priory, across the border in Herefordshire.
The oldest part of the current building is the west end of the nave and north wall, dated to the late 13th century. The lower part of the tower may be from this time period, but most of the rest is 15th century, though the main doorway in the porch may be 16th century. The nave has a wagon roof, possibly 15th century.
There is a Norman font, perhaps 12th century, but the most interesting historic feature is a very nicely carved 14th century screen, which is missing its rood loft. There are several very good 18th century memorials including those to Thomas Williams (d. 1730) and his wife (d. 1739) and a marble plaque to Thomas Williams of Felin Newydd (d. 1779). The altar rails date to around 1660 and feature balusters in a barley-sugar twist pattern.
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Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.