Loop

The Loop is a building located in Cyber City on Cybertron. It functions as the headquarters of the Autobots, Cyber City's defense unit, and may also be the High Council's capitol. It stands in contact with Cybertron's satellite network.

Dreamwave Armada comic
While out in Alpha Sector, Hot Shot came upon a dying Mini-Con and was given a disk by him with the request to bring it to Optimus Prime pronto, so Hot Shot rushed back to the Loop in Cyber City. As he passed by the entrance's two guards, he received info that Optimus could be found in the satellite room. Once there, Hot Shot told his story and Optimus ordered him to play the disk's contents. It turned out to be a plea for help from Mini-Con Village D10, which ended on images of an attack, proving the matter was serious. Despite the warning, the Autobots were unprepared for the power the Decepticons wielded and were forced to leave the Loop for underground headquarters.

When time came to battle Unicron, Over-Run and the Mini-Cons gathered at the Loop. Over-Run held a little speech about the Mini-Cons' immense powers, which were being added to the Mini-Con Matrix, until it had the charge needed to take down the Planet Eater.

Dreamwave Energon comics
What remained of the Loop after the Unicron Battles was demolished to make room for the construction of the High Halls.