Monte Cassino (sometimes written Montecassino) is a rocky hill about 130 kilometres (81 mi) southeast of Rome, Italy, 2 kilometres (1.2 mi) to the west of the town of Cassino and 520 m (1,706.04 ft) altitude. Site of the Roman town of Casinum, it is best known for its historic abbey. St. Benedict of Nursia established his first monastery, the source of the Benedictine Order, here around 529.