The Pythagorean Vault was a comparatively small chamber constructed by the First Civilization, and was later incorporated into the Temple of Pythagoras in Rome. It was largely hollow, save for a small pedestal located in the center of the main chamber on a raised base.
In 1506, the vault was visited by Ezio Auditore and Leonardo da Vinci during their exploration of the Pythagorean temple. In it they were confronted by a series of number and letter codes: "43 39 19 N, 75 27 42 W". Though Leonardo thought that the sequence meant nothing, Ezio simply remarked that it was not meant for either of them.
- The numbers revealed in the Pythagorean vault are the latitude and longitude of Turin, New York, where the Grand Temple is located.