Abraham Alfonse Albert Gallatin (January 29, 1761 – August 12, 1849) was a Swiss-American ethnologist, linguist, politician, diplomat, congressman, and the longest-serving United States Secretary of the Treasury. In 1831, he founded the University of the City of New York. In 1896, this university was renamed New York University; it is now one of the largest private, non-profit universities in the United States.