Predigerkirche ('Preacher's Church') is a monastic church to the Dominican friary adjacent to the church. Predigerkirche was originally built by the Dominican Order in the 13th century, when the mystic Meister Eckhart was prior here. The church only became a Protestant church after the Reformation. The original building was modified in 1340-50, and the bell tower was built between 1447 and 1488. Around 1806 Predigerkirche was used as a POW camp, which led to damage to the interior and the equipment. Repairs were made around 1826.
The first organ of Predigerkirche was installed in 1567, built by Heinrich Compenius der Ältere. His grandson Ludwig Compenius built a new, Baroque style organ by 1650; it was the largest and most expensive organ in the city. Today, Predigerkirche uses a Schuke organ built in 1978.
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.