Lombez Cathedral is a brick church with an ornate pink-and-white five-tiered octagonal bell tower constructed c. 1346. A plaque to the right of the plain west entrance records the visit of the Italian poet Petrarch in 1330, arranged by the bishop, Jacques Colonna (1328–41), also of Italian extraction, who made Petrarch an honorary canon in 1335. The typical blank west façade of meridional Gothic is relieved only by a small roundel and the Flamboyantentrance in stone. The severe exterior is characteristic of the region with tall buttresses around the chevet.
Below the tower in the interior is a remarkable 12th-century baptistry, which was part of an earlier church. The lead baptismal font is made of two pieces, the lower part decorated with religious figures in medallions in the style of the 13th century, and the upper part with a frieze of secular scenes of antique design. The stopper in the base suggests it was used for total immersion which was practised until the 9th century.
Other items of note are the 17th-century walnut choir stalls, the altar in Carrara marble consecrated in 1753, and the 18th-century organ at the west end. The three panels of brilliantly colored 15th–16th-century glass in the chevet are by the followers of Arnaud de Moles, restored in the 19th century, and illustrate scenes from the Life of Christ and from the Passion. The rest of the glass is 19th-century.
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.