While looking for autographs we found this great page that lists all the U. S. Mint Directors from 1773 to present - great for collectors, researchers and historians of the U. S. Mint.
From the web page:
Credit for the success of the Mint belongs in great part to David Rittenhouse. In Philadelphia today, his name graces the city.s most fashionable address . Rittenhouse Square, about a mile west of the Historic District. Like Benjamin Franklin and John Bartram, he was one of those extraordinary men of early Philadelphia with diverse interests who made manifold contributions: he was a clockmaker, philosopher, surveyor, mathematician, politician and astronomer;
He determined the boundary between Pennsylvania and Maryland long before Mason and Dixon; many credit him with having built the first telescope made in the United States; he constructed an orrery, a device familiar mostly to astronomers and crossword solvers . it.s a clocklike mechanism that describes the position of the planets as they orbit the sun; and, he was director of the Mint for its crucial first three years.