The Coinage Act of 1792, passed by Congress, established the first mint in the United States. Philadelphia was chosen for the home of the new mint since it was the Capitol at the time. Back then gold fever was spreading across the U.S. and branch Mints and assay offices had to be opened to handle the huge amount of gold being found. Today the Mint has branch Mints in Philadelphia, San Francisco, Denver, and West Point. Fort Knox also serves as a bullion depository. Yearly coin sets and commemorative coins are starting to excite a whole new generation of collectors.