The creator of the Cincinnati Musical Center half dollar is also the creator of what other coin? 
Thomas G. Melish:  In the 1930s, Melish was responsible for two United States commemorative coin issues, the Cincinnati Musical Center half dollar and the Cleveland Centennial half dollar. Cincinnati Musical Center half dollar:  Produced with the stated purpose of commemorating the fiftieth anniversary of Cincinnati, Ohio as a center of music, it was conceived by Thomas G. Melish, a coin enthusiast who controlled the group which was allowed to buy the entire issue from the government, and who resold the pieces at high prices.
Cleveland Centennial half dollar