The Town Bell is a function of the Town Center in Age of Empires II, Age of Mythology, and Age of Empires III. Once rung, it causes all Villagers to run for shelter and garrison inside the closest available building: Town Center, tower, or other defensive structures. Once the danger is over, the Bell may be rung again to release all Villagers and send them back to work.
If no close-by building has room left to garrison any more units, the Villagers will just keep working.
The Town Bell is a very useful function (especially in earlier stages of a game) to prevent the loss of Villagers and to rout the attackers when the town is under attack.
- In the Age of Empires II campaign scenarios Feeding the Army and Training the Troops, the Town Bell does not work.