The Church of St Peter, St Paul and St John church is fourteenth century in origin but nothing remains of this period beyond a single lancet window in the nave. There are two bells dated 1662 and 1829. The inner doorway of the porch has a stone which bears a consecration cross. The octagonal font bears the inscription Iohn Iones which is dated 1673.
Behind the pulpit is a marble monument, which comprises a broken Ionic column and an inscription to John Gardner Kemeys Esquire (see below). The inscription is concluded with two Kemeys pheons and the family motto in Welsh: Duw dy Ras (God thy grace).
John Gardner Kemeys Esquire of Bertholy House, died 1830 aged 73 yearsColumns and laboured urns but vainly showIn idle scene of decorated woe.The dear relation and the friend sincereNeed no mechanic help to force a tear.In heart-felt numbers never meant to shine'Twill flow eternal o'er a heart like thine;'Twill flow while gentle goodness has one friendOr kindred tempers have a tear to lend.
On the south wall is a large piscina with a trefoil canopy. The Jacobean communion table is made of oak. There is a decorated window in the north wall. Above the chancel arch are rood-beam and corbels, but there is no trace of the rood-screen.
Externally there is a projection from the nave which would have been the stairway to the rood loft, which may have been blocked up at the time that the Kemeys monument was installed. In the churchyard there is a modern churchyard cross, standing on the original chamfered base with five steps. Above the porch entrance is a sundial dated 1718.
References:
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.