Tullibody Old Kirk is a ruined 12th-century church. It was rebuilt in the 16th century, and restored again in 1760. In 1904, St Serf's Parish Church was built to the north of the Old Kirk, which was afterwards disused.
The bellcote on the western gable dates from 1772, while the western windows and the south porch are 19th-century additions. Two doorways survive from the 16th century, including one dated 1539.
Significant monuments include that of George Abercromby (d.1699), and the Haig memorial on the north wall.
During the Scottish Reformation, William Kirkcaldy destroyed the bridge at Tullibody in an attempt to prevent French troops from retreating to the Siege of Leith at the end of January 1560. However, the French removed the roof of Tullibody Kirk and used it to bridge the Devon.
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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.