Attack on Titan ˸ The Path to Liberty

The Walls were three large structures located on Paradis Island that guarded the remnants of Eldia․ They were built by the 145th King of Eldia‚ Karl Fritz‚ more than a century ago using countless colossal-sized skinless Titans which were contained inside the Walls' hollow core․ They stalled the other nations from attacking Paradis‚ under the false threat that the King would unleash the Titans inside upon the world if they did so․ The Walls crumbled about a century later when Eren Jaeger used the power of the Founding Titan to free the Titans within them