Torre Coltellazzo
The Coltellazzo Tower was built in 1607 above the remains of the acropolis of Nora. The building was built by engineer Antonio Felice de Vincenti. The tower, also known as the tower of Sant'Efisio, has a truncated conical structure of about 11 meters high, built with limestone sandstone. At the center of the tower is a room which is supported by a central pillar.