The church of Saint Charles in Arona was designed by architect Francesco Maria Richini and built starting from 1614.
The building consists of a single large square room in a baroque style. The motto of the Borromeo family “Humilitas” is written in the centre of the black and white marble floor. The inside of the late baroque dome was painted in the early XVIII century.
From the two doors either side of the altar, you reach a corridor that encircles a chapel dedicated to the birth of Saint Charles. This room is a reproduction of the “room of the three lakes”: in fact, some parts of the room of the castle, where the saint was born, were brought here in order to allow better access to the pilgrims. In the chapel, two closets with wood inlay doors, preserve relics of the saint.
In the same corridor there is a sedan chair, used by Saint Charles, and a wooden model of Milan Cathedral made by the seminarists of the local seminary, on occasion of the third centenary of the saint’s death.
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.