Columbia University in the City of New York is a private Ivy League research university located in Upper Manhattan, New York City, and is among the most selective and prestigious institutions of higher learning. Columbia is the oldest institution of higher learning in New York state, the fifth oldest in the United States, and one of the country's nine Colonial Colleges founded before the American Revolution. It was founded in 1754 as King's College by royal charter of George II of Great Britain. After the American Revolutionary War, King's College briefly became a state entity, and was renamed Columbia College in 1784. The University now operates under a 1787 charter that places the institution under a private board of trustees, and in 1896 it was further renamed Columbia University. Notable alumni and former students of the university and its predecessor, King's College, include five Founding Fathers of the United States; nine Justices of the United States Supreme Court; 43 Nobel Prize laureates; 20 living billionaires; 29 Academy Award winners; and 29 heads of state, including three United States Presidents.