Town Center
The Town Center is a key economic building in Age of Empires II that becomes freely available for construction once the Castle Age is reached, before which it is limited to one. It trains and improves Villagers, advances through Ages, and serves as a drop off point for all resources. Each Town Center also provides five population.
Up to 15 Villagers can garrison in Town Centers for shelter from attacks. By doing so, they give the Town Center an attack (arrow fire). This way, players can survive and fend off early attacks. Archers can also garrison in Town Centers to give it an attack. Any non-mounted unit can heal its HP if garrisoned. This is especially useful before the Castle Age when there are no Monasteries and Monks.
Town Centers cannot be converted.