The Mangonel is the "classic" catapult, and was invented by the Romans. It was far more powerful, though less accurate, than the ballista. Like the ballista, the Mangonel stored its power in the arm and ropes. The angle of the arch that projectiles were fired in, could be adjusted by adjusting the stopping block, and had a maximum range of 1300 ft. It was also easy to make, and with wheels, easy to move.