The Church of St. Tysilio and St. Mary stands on a site that was once the centre of early Welsh Christianity. The church has been rebuilt and modified throughout the centuries, and there are examples of work surviving from every architectural period from the Normans to the present day.
The site is believed to have become a Christian foundation c.550, dedicated first to St. Gwyddfarch, and later to St. Tysilio. The remains of this early church were still visible in the eighteenth century, but little trace remains today. A second church was built in the twelfth century by Madoc Mareddud, whose remains are believed to be buried within the grounds; much of the fabric of this building remains today.
Since the first foundation of the church it been extended and renovated on a number of occasions, and has an eclectic range of styles; a wide Romanesque nave, fourteenth century moulded entrance, fifteenth century tower and south window, seventeenth century octagonal font, and predominantly nineteenth century fenestration and fixtures, such as the oak pulpit. The pews were made in the nineteenth century but incorporate seventeenth century panel screens.Built from predominantly local rubble stonework with a slate roof and dressings that include stone gargoyles, this church is a display of Welsh Christianity through the centuries.
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.