Longdan

The Longdan is a mobile fortress-like structure from Code Geass and is a fortress featured in Knights of the Multiverse Season 1. It is a pyramid-shaped created by the evil organization L.O.S.R. designed specifically to help defend their desert-based fortress, Pyramidas. Four fortresses in total were constructed.

Weapons
The Longdan is armed to the teeth with cannons of varying sizes, with dozens of standard machine guns, laser turrets, cannons and an enormous on in the center.
 * Cannons