May 8, 1953: Seven schools - Clemson, Duke, Maryland, North Carolina, N.C. State, South Carolina and Wake Forest - withdraw from the Southern Conference and meet at the Sedgefield Inn near Greensboro to draw up new bylaws. The next month, the bylaws are adopted, and the Atlantic Coast Conference is formed.
December 4, 1953: Conference officials meet again at the Sedgefield Inn and admit Virginia as the league's eighth member.
June 30, 1971: South Carolina becomes the first and only school to resign from the ACC. It leaves to become independent.
April 3, 1978: Georgia Tech, formerly of the Metro Conference, is admitted as the ACC's eighth school.
July 1, 1991: Florida State also leaves the Metro Conference to become ACC's ninth member.
July 1, 2004: Miami and Virginia Tech leave the Big East to become the ACC's 11th and 12th members.
July 1, 2005: Boston College becomes the league's 12th member after accepting the invitation in October, 2003.
Sept. 18, 2011: The ACC announces it will add Pittsburgh and Syracuse as its 13th and 14th members.