Cybertron History Museum

The Cybertron History Museum is a large building on Cybertron, holding artifacts of value to the Autobots after the Great War. Those entering the front door are greeted by a Matronly Docent who offers maps for the tour, and the halls are patrolled by Museum Guards who keep everything safe. Among the items stored there is a space bridge.

2015 Robots in Disguise cartoon
Lieutenant Bumblebee, now a member of the police force, was pointed to the building by the spirit of Optimus Prime, specifically to the image above the door of a star system. Bumblebee entered the museum, disregarding the Docent who greeted him, and eventually found the space bridge, which he gathered from Optimus he needed to use to reach Earth. Unfortunately his partner Strongarm had followed him in with a captured perp, Sideswipe. He got them to disable the space bridge's stasis fields while he kept the guard occupied, however the guards soon cottoned on that something was up, leading to a shootout. Fortunately Sideswipe managed to get the space bridge working, and the trio, now fugitives, went through it to Earth.