While it is hard to overstate the impact of the Rev. Dr. Martin Luther King, Jr. on Black freedom, American politics and world history, he is perhaps most famously remembered for his August 28, 1963 "I Have A Dream" speech.

Delivered as the keynote address during the March on Washington, King’s words have gone down in history as one of the world’s most inspiring and influential speeches of all time. The speech is still having a notable impact on American history today. For example, the Atlanta Dream WNBA team, who are named after King’s speech, were influential in helping to elect the Rev. Raphael Warnock – the pastor of the Ebenezer Baptist Church where King once preached – as the 11th Black person to serve in the U.S. Senate.

While it is hard to find an American who does not know many of the key phrases and statements from the “I Have a Dream” speech, there’s much about King’s address that history books and retrospectives often omit or overlook. Here then are five things you likely don’t know about the March on Washington and King’s ‘I Have A Dream’ speech.