The mysterious inscription of Sora.
Sora, an ancient Volscian town, was thrice captured by the Romans, in 345, 314, and 305 BCE, before they managed, in 303, by means of a colony 4,000 strong, to confirm its annexation. In 209, it was one of the colonies that refused further contributions to the war against Hannibal. By the lex Julia, it became a municipium, but under Augustus, it was colonized by soldiers of the
legio IV Sorana, which had been mainly enrolled there. It belonged technically to Latium adiectum.
The city and the ducal palace in 1604
Located in the Ducatus Romanus under the authority of the pope during the early Dark Ages, it was captured by the Lombards of Gisulf I of Benevento in 705.
The castle of Sorella, built on the rocky height above the town,
was in the Middle Ages a stronghold of some note. In 1443, King Alfonso of Naples made Sora the seat of an independent Duchy for the
Cantelmi; it was afterwards seized by Pope Pius II, but being restored to the Cantelmi by Pope Sixtus IV, it ultimately passed to the Della Rovere of Urbino. Against Caesar Borgia, the city was heroically defended by
Giovanni da Montefeltro. It was purchased by Pope Gregory XIII for 11,000 ducats and bestowed under the suzerainty of Gregory's son, Giacomo Boncompagni (who was the first duke of Sora of the family).