Since its creation, the Southern District of New York has had over 150 judges, more than any other District. Twenty judges from the Southern District of New York have been elevated to the United States Court of Appeals for the Second Circuit—Samuel Blatchford, Charles Merrill Hough, Learned Hand, Julius Marshuetz Mayer, Augustus Noble Hand, Martin Thomas Manton, Robert P. Patterson, Harold Medina, Irving Kaufman, Wilfred Feinberg, Walter R. Mansfield, Murray Gurfein, Lawrence W. Pierce, Pierre N. Leval, John M. Walker Jr., Sonia Sotomayor, Denny Chin, Barrington Daniels Parker Jr., Gerard E. Lynch, and Richard J. Sullivan. Blatchford and Sotomayor, after being elevated from the Southern District of New York to serve as Circuit Judges for the Second Circuit, were later elevated to the Supreme Court of the United States. The longest serving judge, David Norton Edelstein, served as an active judge for 43 years to the day, and in senior status for an additional six years.