Monfalcone Castle, locally known as Rocca di Monfalcone or Castello di Monfalcone, lies on a mountain north of the town with the same name. Originally a prehistoric fortified village, the site was occupied by a Roman observation tower, guarding the road from the town of Aquileia to Trieste, and later by a fortress dating back to the reign of Theoderic the Great (around 490 AD).
As a stronghold of the Patriarch of Aquileia, overseeing the County of Duino, the castle was long contended for by the Patriarch and the Count of Gorizia, but was also a 'free commune' holding a seat in the Friulian Parliament.
Having surrendered on 14 July 1420 to the troops of the Venetian doge, Tommaso Mocenigo, it became an important outpost for the protection of the Venetian mainland against the Count of Gorizia and the Austrian Emperor and a defence against the attacks of the Turks.
In 1797 it came under Austrian rule and on 9 June 1915 it was occupied by the Italian army.
The castle is a square keep surrounded by a circular wall and a low earthen wall.
References:The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.