The Philadelphia Project, also known as the Philadelphia Experiment or Project Rainbow, was a 20th century United States naval military experiment that occurred at the Philadelphia Naval Shipyard, in Philadelphia, Pennsylvania.
Conducted in 1943, the experiment employed a Piece of Eden in an attempt to either render the USS Eldridge, a Cannon-class destroyer escort, invisible or transform it into a vessel for time travel. The latter proved marginally successful, as the ship manifested itself in a future state for approximately 18 minutes, but the Piece of Eden was severely damaged in the process.
Many years later, Abstergo Industries used their Animus Subject 12 to collect data on not only this experiment's results, but also on the mechanics behind the artifact and how to repair it. These goals they achieved, and they managed to reconstruct the Piece of Eden.
Nevertheless, Abstergo's administration maintained that the risks of tampering with time-particularly paradoxes were too unpredictable and dangerous for the project to resume. They upheld their policy that any objects discovered to be capable of manipulating time were to be securely contained, closing this project.
On September 7, 2012, the CEO of Abstergo Industries, Alan Rikkin, sent an email to Warren Vidic summarizing their findings on various artifacts, which included the one used as part of the Philadelphia Project.
- Shortly before his death in 1943, Nikola Tesla supposedly claimed to have completed some kind of a "Unified Field Theory", though it was never published. It is widely thought that the disappearance of USS Eldridge was made possible through the application of this theory.