The construction of the Chiesa di Santa Maria Annunziata (dedicated to the Annunciation of the Virgin Mary) was begun in 1453 by the architect Filippo delle Vacche of Caravaggio. It is built in the Late Gothic style to replace the previous edifice that stood at the site. Its façade remains unfinished.
The church preserves within it paintings by Romanino, Moretto da Brescia, Zenone Veronese and Paolo Veneziano. There is a grand polyptych of gilded wood dating from 1510. There are frescoes executed by Antonio Vassilacchi dating from 1602.
The main entrance into the church is through the great portal executed between 1506 and 1508 by Gasparo Cairano and Antonio Mangiacavalli, who were among the chief exponents of Renaissance sculpture in Brescia.
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.