In the Roman period this area was already inhabited, but the first documented settlements date back to the Middle Ages when the population took refuge in a castle controlled by the monks of the Abbey of Farfa.
The ‘Castellum de Lori’ came under the Holy See on August 11, 1191 and became the Castrum of Montasola. In the mid-fourteenth century, Montasola rebelled against the papal rule and was declared ‘outlawed’ land.
The area was then controlled by the Savelli family, followed by the Orsini and then again by the Savelli. In 1501 it became part of the papal possessions with Pope Alexander VI, and was finally purchased by the Apostolic Chamber in 1592.