Martin Luther King Jr is remembered for his tireless work during the Civil Rights Movement and his dream that one day everyone would be treated as equals. A statue built in his memory now stands in Washington D.C. and each year, the third Monday in January is celebrated as Martin Luther King Jr. Day, an American federal holiday.

Martin Luther King Jr., a reverend and civil-rights activist, was assassinated at 39. However, he inspired several movements and political changes.

Celebrate Martin Luther King Jr.'s legacy with a look back at 15 of his most powerful quotes, including the iconic 'I Have a Dream' speech and more.