The Gettysburg Address ranks among the most famous presidential speeches, and the great oration delivered by President Abraham Lincoln just turned 150 years old today. A special ceremony will be held Tuesday to commemorate the speech in Gettysburg, Pa.

The Gettysburg Address Dedication Day Ceremony includes appearances by U.S. Secretary of the Interior Sally Jewell and Civil War historian Dr. James McPherson and a wreath laying ceremony, according to the National Parks Service. President Barack Obama will not be attending the event, the Associated Press reported.

To help you get in the spirit of the 150th anniversary of the Gettysburg Address, which was delivered by Lincoln in the midst of the Civil War, here is the full text of the speech:

“Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.

“Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this.

“But, in a larger sense, we cannot dedicate -- we cannot consecrate -- we cannot hallow -- this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us -- that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion -- that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom -- and that government of the people, by the people, for the people, shall not perish from the earth.”