Sword of Akasha

The Sword of Akasha is a large and mysterious hovering temple-like structure built by the Holy Empire of Britannia and used almost exclusively by the Emperor himself. It has been said that its purpose is to "kill the gods" as per the Emperor's Geass contract with V.V., though how it will do that, or even the exact nature of the target gods, is left ambiguous. Its design resembles a combination of ancient Roman and Celtic architecture.

The exact location of the Temple is also unknown, in all depictions it is shown flouting in billowing clouds with no land or sky in sight. It also seems unusually close to a planet, which is implied to be Jupiter. Entry to the temple seems only possible using Thought Elevators. The temple has been greatly damaged by Lelouch using the Shinkirō's hadron blasters in an attempt to rescue C.C.. When revisited by Charles most if not all the architecture on the highest platform has been destroyed.

Charles attempted to use the system to initiate Ragnarök to destroy the old world and create a new one. His plan however, was thwarted by Lelouch, who sealed off the system from the physical world by destroying the Thought Elevator in Kamine Island.

"Akasha" is a Sanskrit word meaning "aether", a possible reference to the element in Hindu Mythology.