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.
The hilltop sanctuary was the site of the Battle of Monte Cassino in 1944, where the building was destroyed by Allied bombing and rebuilt after the war. The site has been visited many times by Popes and other senior clergy, including Pope Benedict XVI in May 2009.
Since the reforms of the Second Vatican Council the monastery is one of the few remaining territorial abbeys within the Catholic Church. On 23 October 2014, Pope Francis applied the norms of the motu proprio Ecclesia Catholica (Paul VI, 1976) to the Abbey. This act removed from its jurisdiction all 53 parishes and reduced its territory to the Abbey itself - while retaining its status as a Territorial Abbey. The former territory of the Abbey, except the land on which the Abbey Church and monastery sit, was transferred to the local diocese of Sora-Cassino-Aquino-Pontecorvo.
The history of Monte Cassino is linked to the nearby town of Cassino which was first settled in the fifth century B.C. by the Volsci people who held much of central and southern Italy. It was the Volsci who first built a citadel on the summit of Monte Cassino. The Volsci in the area were defeated by the Romans in 312 B.C. The Romans renamed the settlement Casinum and build a temple to Apollo at the citadel. Modern excavations have found no remains of the temple, but ruins of an amphitheatre, a theatre, and a mausoleum indicate the lasting presence the Romans had there.
Generations after the Roman Empire adopted Christianity the town became the seat of a bishopric in the fifth century A.D. Lacking strong defences the area was subject to barbarian attack and became abandoned and neglected with only a few struggling inhabitants holding out.