Pontecorvo is a town and comune in the province of Frosinone, Lazio, Italy. Its population is c. 13,200. The village lies under Rocca Guglielma, a medieval fortification perched on an inaccessible spur. Its name derives from the pons curvus, "curved bridge", that may still be seen spanning the Liri in the center of the town that grew around the bridgehead in the course of the Middle Ages. The curve of the bridge was intended to divert timbers that might strike its piers during floods.