The Cremona Baptistery is annexed to the city's Cathedral. Built in 1167, it is characterized by an octagonal plan, a reference to the cult of St. Ambrose of Milan, symbolizing the Eight Day of Resurrection and, thenceforth, the Baptism. The edifice mixes Romanesque and Lombard-Gothic styles, the latter evident in the preference for bare brickwork walls. To the 16th century restorations belong the marble cover of some walls, the pavement and the baptismal font (1531) and the narthex (1588) of the entrance, in Romanesque style, work by Angelo Nani.
The interior has a 14th-century Crucifix, over the St. John altar, and two wooden statues portraying 'St. Philip Neri' and 'St. John the Baptist' by Giovanni Bertesi. Over the ceiling is a 12th-century statue of the Archangel Gabriel.
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.