Aincrad is the mobile fortress containing the Order of Holy Templars. Since his disappearance, it has been the base of operations belonging to Anu and the Holy Knights that remained loyal to "the Holy Father" as they know him. It is surrounded by sixteen obelisks which amplify the magical barrier around the Sanctum, which doubles as a perception filter to all who seek it without bearing the Templar Seal. Those who possess a seal are linked to one of the obelisks, each of the sixteen belonging to a subdivision of the Holy Templars.

Aincrad is an iron-and-stone made floating castle that has about ten kilometers floor base diameter and consists of a hundred floors stacking straight upwards, meaning that each floor's diameter is a bit smaller than the previous one. On each floor, there are a couple of large cities along with countless small scale towns and villages, forests, plains, and even lakes. Only one stairway links each floor to another, and the stairways exist beyond the boss room of each Labyrinth. The Teleport Gates of every unlocked cities are connected to one another.

Luviagelita's Floor (Floor 99)
Spoiler:


12 Peers Floor (Floor 98) *Formerly the Headquarters of Jeanne d'Arc*
Spoiler: