Through its Bank of New York predecessor, it is one of the three oldest banking corporations in the United States, and among the oldest banks in the world, having been established in June 1784 by a group that included American Founding Fathers Alexander Hamilton and Aaron Burr.[1] T. Mellon and Sons Bank, was founded in Pittsburgh in 1869 by Thomas Mellon and his sons Andrew and Richard. Andrew W. Mellon later became Secretary of the Treasury.