The coin stems from the desire of the Columbian Exposition's organizers to gain federal money to complete construction of the fair. Congress granted an appropriation, and allowed it to be in the form of commemorative half dollars, which legislators and organizers believed could be sold at a premium. Fair official James Ellsworth wanted the new coin to be based on a 16th-century painting he owned by Lorenzo Lotto, reputedly of Columbus, and pushed for this through the design process. When initial sketches by Mint Chief Engraver Charles E. Barber proved unsatisfactory, fair organizers turned to a design by artist Olin Levi Warner, which after modification by Barber and by his assistant, George T. Morgan, was struck by the Mint.