Google is celebrating the 50th anniversary of Martin Luther King Jr.’s”I Have a Dream” speech with a homepage doodle that recreates the historic moment.

In the doodle (click left), King stands before the crowd on the National Mall in Washington, D.C., with words from his speech filling the background.

King delivered the speech during the 1963 March on Washington, a political rally for human rights. He tackled racism in America, and laid out his dream for a future free from prejudice.

Among the more famous passages from the speech is “I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character.” He ended the speech with a call to “let freedom ring” across the country, so that one day, all Americans could “join hands and sing in the words of the old Negro spiritual: ‘Free at last! Free at last! thank God Almighty, we are free at last!'”

For more, read the speech in its entirety(Opens in a new window) or watch it in the video below.

In honor of the 50th anniversary of King’s speech and the March on Washington, a “Let Freedom Ring” ceremony is taking place in Washington, on the very spot that King gave his speech. President Obama is expected to address the crowd at 2:45 p.m. Eastern. The events are being live-streamed on the White House website(Opens in a new window) and via The King Center(Opens in a new window).

This is not the first time Google has featured King on its website. Since 2010, the search giant has honored his birthday with homepage doodles.

For more of Google’s doodles, see the slideshow above. Recently, the search giant has honored Rembrandt van Rijn, the Roswell UFO incident, architect Antoni Gaudí, author Maurice Sendak, Julius Richard Petri, graphic designer Saul Bass, Ella Fitzgerald, and Hitchhiker’s Guide author Douglas Adams.