Modern commemorative coin sets, particularly those issued by the United States Mint, are designed to honor significant events, individuals, and anniversaries in American history. The 2003 Modern Commemorative Sets included coins celebrating the 50th anniversary of the United States Assay Commission and the 200th anniversary of the Louisiana Purchase. These collectible coins often feature unique designs and are produced in limited quantities, making them sought after by numismatists and collectors. The sets typically consist of various denominations, including silver dollars and half dollars, crafted with special attention to quality and detail.