Walls

The Walls exist since more than a century ago. The humans started to become extinct at the hand of the Titans. Due to this the humans made huge walls to protect their last stronghold. The walls reach about 50 meteres in height. The tops of the walls are lined with cannons, which can fire on approaching Titans.

The interior of the walls seem to contain numerous dormant Titans. It has been suggested that the walls were originally created by Titans using their hardening ability.

Wall Maria
Wall Maria is the most outer wall of the kingdom. It was breached 5 years before the current storyline by the Colossal Titan.

Wall Rose
Wall Rose is the second most outer wall. It is thought to have been breached when Titans appear within the wall in Warrior's Dance, but investigation reveals there are no cracks in the wall.

Wall Sina
Wall Sina is the internal wall and the last wall to protect the kingdom.