Castello Di Montebello / Museo Archeologico

Montebello Castle (known as the Small, New or Middle Castle in the 15th century, as Schwyz Castle from 1506 and St. Martin's Castle after 1818) is located to the east of the town center. It was built before 1313 for the pro-Imperial Rusca family, who occupied the castle following the Visconti victory and occupation of Castelgrande. By the end of the 14th century it was in the hands of the Visconti.^[14] The castle was renovated and expanded between 1462 and 1490 to its current state. In the 19th century the castle fell into disrepair and was renovated starting in 1903.

Unlike Castelgrande, Montebello was not protected by natural features. It is surrounded by deep moats that protected the walls. The complex is rhomboid in shape and connected to the city walls on the south and north. The castle clearly shows the three stages of construction, with the original central keep surrounded by the 14th century walls which are in turn surrounded by the 15th century walls.

The inner keep dates from before 1313 and is an irregular rectangle. It appears that the battlemented tower with a hip roof on the north-east side of the keep is an incorrect reconstruction from 1903. Prints from the 17th century show a four-story building with a roof sloped toward the interior of the keep.^[14] The keep was built with a high, strong outer wall with living quarters and utility buildings along the inner wall. The original entrance is located high on the western wall and can only be reached by climbing an external flight of stairs. The well in the inner eastern bailey may be from the original castle.

The 14th century wall was partly included in the later 15th century wall, but some original sections can still be seen. The 14th century gateway is supported by a projecting gatehouse, though the inner and outer drawbridges are modern reproductions.