So-Called Dollars are a type of commemorative medallion or coin issued primarily in the United States, often created to honor a specific event or individual. The term originates from the series of pieces that emerged around the time of the 1892 Columbian Exposition, with later examples, including those from 1901, celebrating various historical events. These items are not official U.S. currency, but they are collectible due to their artistic design and historical significance. They are typically cataloged in specialized references, making them popular among numismatists and collectors of Americana.