United States commemorative coins - Wikipedia
en.wikipedia.org › wiki › United_StatesMost standard US commemorative coin lists begin with the 1892 Columbian half dollar commemorating the 400th anniversary of Columbus ' voyage to America. The following year, the Columbian Exposition quarter dollar featuring Queen Isabella of Spain was issued. [4] In 1915, the mint issued the Panama–Pacific half union, which had a face value of $50.