Fort Knox, Kentucky, is the site of a U.S. army post, but it is even more renowned for the Fort Knox Bullion Depository, the massive vault that contains the bulk of the U.S. government's gold deposite. Completed in 1936, the vault is housed in two-story building constructed of granite, steel, and concrete, the vault itself is made of steel and concrete and has a door that weights more than twenty tons. Naturally the most up-to-date security devices available are in place at Fort Knox, and the army post nearby provides further protection.