The Benedictine Monastery of San Nicolò l'Arena in Catania, Sicily, is one of the largest monasteries in Europe and the second biggest Benedictine monastery in Europe. The monastery was founded in 1558 and today it hosts the Department of Humanities of the University of Catania.
The monastery complex is located in the historical centre of the city of Catania, with the church of San Nicolò l'Arena. It shows architectonical integration of many styles through different centuries. Although the monastery was founded in the 16th century, it was modified by two natural disasters in the 17th century. In 1669 the 1669 Etna eruption surrounded the city of Catania, widening the coast for more than 1 km, and the monastery too. So the monastery was not destroyed by the lava but the area around was completely modified by a lava bench 12 meters high.
In 1693 the earthquake of Val di Noto destroyed the entire east coast of Sicily and Catania. The monastery was terribly damaged and the only floor that survived was the basement.
In 1702 the rebuilding started and lasted until 1866 (when the new Reign of Italy confiscated the monastery). The original monastery was rebuilt on the top of the latter, and they added a new cloister (the eastern cloister) and a new area (the large part designed by Giovanni Battista Vaccarini) on the top of the lava bench.
In 1977 the monastery was donated to the University of Catania, which restored the entire structure; in 1984 Giancarlo De Carlo started to design the entire restoration work.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.