Cordy Tindell Vivian (July 30, 1924 – July 17, 2020) was an American minister, author, and close friend and lieutenant of Martin Luther King Jr. during the civil rights movement. Vivian resided in Atlanta, Georgia, and founded the C. T. Vivian Leadership Institute, Inc. He was a member of the Alpha Phi Alpha fraternity. Senator Barack Obama, speaking at Selma's Brown Chapel on the March 2007, anniversary of the 1965 Selma to Montgomery marches, referred to Vivian in his opening remarks in the words of Martin L. King Jr. as "the greatest preacher to ever live."