Sasso Corbaro Castle
Sasso Corbaro
Sasso Corbaro, known as Unterwalden Castle after 1506 and Saint Barbara's Castle after 1818, is about 600 m (2,000 ft) south-east of town on a rocky hill. Unlike the other two castles Sasso Corbaro is not integrated into the city walls. The first part of the castle was the north-eastern tower which was built in 1478 to close a gap in the defenses of the city. In 1479 a small garrison was moved to the tower. During peacetime the tower was used as a prison, though at least one prisoner escaped in 1494.[18] The walls and south-west tower were added later. The castle was struck by lightning multiple times during the 16th and 17th centuries, and by 1900 was falling into ruins.
The fortress is a 25 by 25 m (82 by 82 ft) square with square towers on the north-east and south-west corners. The east wall is 1.8 m (5 ft 11 in) thick and other walls are about 1 m (3.3 ft) thick. All the walls have machicolations and swallowtail merlons for defense. The entrance to the courtyard is through the western wall, and contains evidence of a portcullis. The two-story buildings on the south and west walls were both living quarters with a gabled roof. The castle chapel is located on the eastern side of the courtyard.
The north-eastern keep currently has four stories, though no records exist of its original height and roof. It was used as a living area when the castle was occupied.
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