Torkilstrup Church was built of hewn fieldstone rather than brick, indicating it is one of the oldest churches on the island from before 1160. The western part of the chancel and the nave from the Romanesque period are built of hewn fieldstone with a few limestone trimmings. Rounded-arch friezes, sometimes with ornamental lilies, decorate the north and south walls of the nave, indicating an early design. The round-arched south door is still in use while the north door is bricked up. In addition to the Romanesque window in the chancel, there are traces of Romanesque windows in the nave's north wall. The extension of chancel possibly occurred as early as the 14th century but could have been during the Late Gothic period when the tower and porch were added. One of the bells in the tower is dated 1491.
The low Romanesque chancel arch was probably adapted when cross-vaulting was added to the nave in the Gothic period. Traces of frescos from the second half of the 15th century have been found in the vaults. The altarpiece (1650) is the work of Jørgen Ringnis, as is the pulpit (1640). The altar painting (1840) is by Lucie Marie Ingemann, depicting the Bible story Suffer the little children to come unto me. An Early Gothic crucifix from c. 1300 hangs in the church. B. S. Ingemann's father, Søren Ingemann, is buried under the floor in the west section of the nave. The almost barrel-shaped Romanesque font of sculpted granite has a rope-shaped rim.
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.