From Dragon Eye Atlas
But with war and conquest, the town has slowly been turned into a fortified town, then into essentially a large fortress. Its city walls dwarf many castles, and its towers are topped off with ballistas and trebuchets. No less then three gates must be passed when entering it, all heavily fortified and with arrow slits to all sides and murder holes above.
While it still serves as a market for surrounding villages, it has long become more of a military outpost than a civilian town.