The four gatehouses are the four buildings that contain tunnels from the outer city through the inner wall to the inner city. They are typically protected by the Four Castles, though the South Castle is one and the same as the South Gatehouse, as it is located farther north than would be typical.
- East Gatehouse (Has been relocated and replaced with a new plaza)
- West Gatehouse (current location of the Clocktower District)
- North Gatehouse
- South Gatehouse (South Castle)