In Age of Empires, the Catapult is slow lumbering device used to eliminate buildings and defenses. Its attack features medium Area of Effect damage, regardless of whether the unit is a friend or foe.
The direct upgrade of the Stone Thrower, they are fairly expensive and more effective, but less so than the Heavy Catapult. They also have a minimum range of 2. Catapults deal 28 bonus damage against buildings (40) after accounting for building armor but only 10 bonus damage against towers (22).