Paul Robeson was an acclaimed 20th-century performer known for productions like "The Emperor Jones" and "Othello." He was also an international activist.

Medgar Evers was a civil rights activist who organized voter-registration efforts, demonstrations and boycotts of companies that practiced discrimination.

African-American chemist Percy Julian was a pioneer in the chemical synthesis of medicinal drugs such as cortisone, steroids and birth control pills.

Marcus Garvey was a proponent of the Black Nationalism and Pan-Africanism movements, inspiring the Nation of Islam and the Rastafarian movement.

Barbara Jordan was a U.S. congressional representative from Texas and was the first African American congresswoman to come from the Deep South.

One of the "Big Six" leaders of the Civil Rights Movement in the 1960s, John Lewis has continued to fight for people's rights since joining Congress in 1987.

Considered one of the best baseball players of all time, Hank Aaron broke Babe Ruth's hallowed record of 714 home runs in 1974, finishing with a career total of 755.

In 1967, Richard Loving and his wife Mildred successfully defeated Virginia's ban on interracial marriage via a famed Supreme Court ruling that had nationwide implications. Their story is the subject of the 2016 film 'Loving.'

Stokely Carmichael was a Trinidadian-American political activist best known for leading the civil rights group SNCC in the 1960s.

Actor, singer and activist Harry Belafonte has achieved lasting fame for such songs as "The Banana Boat Song (Day-O)," and for his humanitarian work.

Jesse Jackson is an American civil rights leader, Baptist minister and politician who twice ran for U.S. president.

John F. Kennedy, the 35th U.S. president, negotiated the Nuclear Test-Ban Treaty and initiated the Alliance for Progress. He was assassinated in 1963.

Nelson Mandela became the first black president of South Africa in 1994, serving until 1999. A symbol of global peacemaking, he won the Nobel Peace Prize in 1993.

Famed 19th-century author and orator Frederick Douglass was an eminent human rights leader in the anti-slavery movement and the first African-American citizen to hold a high U.S. government rank.

Prolific author Pearl S. Buck earned a Pulitzer Prize for her novel The Good Earth. She was also the fourth female to win a Nobel Prize for Literature.

Ruby Bridges was the first African-American child to attend an all-white public elementary school in the American South.

Educator Booker T. Washington was one of the foremost African-American leaders of the late 19th and early 20th centuries, founding the Tuskegee Normal and Industrial Institute, now known as Tuskegee University.

W.E.B. Du Bois was one of the most important African-American activists during the first half of the 20th century. He co-founded the NAACP and supported Pan-Africanism.

Thurgood Marshall was instrumental in ending legal segregation and became the first African-American justice of the Supreme Court.

A. Philip Randolph was a trailblazing leader, organizer and social activist who championed equitable labor rights for African-American communities during the 20th century.

James Meredith is a civil rights activist who became the first African American to attend the University of Mississippi in 1962.

Jimmie Lee Jackson was shot and killed by an Alabama state trooper in 1965; his death inspired a civil rights demonstration that led to the Voting Rights Act.

Ian McKellen is a revered, award-winning British actor of stage and screen known for his starring roles in 'The Lord of the Rings' and 'X-Men' films.

Martin Luther King Jr. was a Baptist minister and social activist, who led the Civil Rights Movement in the United States from the mid-1950s until his death by assassination in 1968.