Petrella Salto is a town and comune in the province of Rieti, Lazio, Italy. Situated in the Salto Valley near Lake Salto, the town has medieval origins and is notable for the Rocca di Petrella, a historic fortress where Beatrice Cenci, a noblewoman infamous for her role in a high-profile 16th-century murder case, was imprisoned. The fortress played a significant role in the region's history during the Middle Ages.