The Federal Reserve Building's three-story gold vault is toward the western end of the site, adjoining Nassau Street. The vault rests on Manhattan's bedrock, below street level and below sea level, and contains the largest known monetary-gold storage reserve in the world. , the vault housed approximately 497,000 bars of gold, weighing about . The Fed serves as a guardian for the gold and does not own it outright. Nearly 98 percent of the building's gold is owned by the central banks of 36 foreign nations. The remaining two percent is owned by the United States and international organizations such as the IMF. , the building's vault holds of gold bullion and $3 million (book value) in gold coins for the United States, just over 5 percent of the United States' total gold reserve.