Källunge church (Källunge kyrka) is a church in the island-bishopric of Visby on Gotland. The church is richly decorated with reliefs and frescoes. The frescoes are important evidence of the strong Byzantine influence on Swedish art of the 12th and 13th centuries. An early depiction of a nyckelharpa is found in a relief dating from circa 1350 on one of the gates of the church.
The church gives its name to the Källunge codex (Latin Codex Kellungensis) a 1622 collection of choral music by Philipp Dulichius, Melchior Vulpius, Gregor Aichinger, Nicolaus Zangius,Hieronymus Praetorius, Hans Hassler, Jacobus Gallus, Johann Walter, Dominique Phinot, Orlando di Lasso, and Johann Bahr among others. The collection was discovered in 1913, though only the alto part is extant. 100 of the 315 pieces have been identified from other collections.
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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.