As the nation remembered civil rights leader Martin Luther King Jr on his birthday Monday, the King Center in Atlanta has published 200,000 never-seen-before documents by or about the King on its website.

The online archive includes hate mail to King, personal notes, letters from children's, quotes, telegrams to John F Kennedy, letter to the then vice president Richard Nixon and a handwritten draft of King's Nobel Peace Prize acceptance speech.

In a letter to Nixon written on August 30, 1957, King said: It is almost my firm conviction that the full effect of the Civil Rights Bill will depend in large degree upon the program of a sustained mass movement on the part of Negroes.

History has demonstrated that inadequate legislation supported by mass action can accomplish more than adequate legislation which remains unenforced for the lack of a determined mass movement.

Letter to Vice President Richard Nixon

The online archives also include letters criticizing King for being a communist.

US President Barack Obama with his wife and children commemorated the day volunteering at a library in Washington DC.

According to BBC, the online archives documents published by the King Center also include scraps of paper with sermons and letters written from prison, as well as hate mail addressed to King, calling African-Americans savages.

The archive is helping to preserve and extend my father's important message to sustain the momentum of non-violent social change around the world, Martin Luther King III, president of the King Center, said.

There's nobody who can't serve and participating in community service was the best way to celebrate the civil rights leader's legacy, Obama said.

Obama painted King's quote on schools library wall: The time is always right to do what is right, and Michelle Obama painted I have a dream.

King comments on John F. Kennedy

Martin Luther King