Americans across the country honored Abraham Lincoln on his 200th birthday Thursday.
The Senate approved a resolution honoring the 16th president.
Schoolchildren in Lincoln's home state of Illinois also remembered him by reciting the Gettysburg Address.
President Obama gave Lincoln strong tributes.
"I feel a special gratitude to this singular figure who in so many ways made my own story possible and who in so many ways made America's story possible," he said.
Obama said we remain a united nation because of Lincoln.
"Despite all that divided us, north and south, black and white, he had an unyielding belief that we were, at heart, a nation of one people. And because of Abraham Lincoln, and all who've carried on his work in the generations since, that is what we remain today," he said.