The only known original copy of General Order No.3, the document that declared all enslaved African Americans in Texas free at the end of the U.S. Civil War, will be on display in Dallas at Fair Park this summer.

Union General Gordon Granger issued the order on June 19, 1965, in Galveston, Texas. He publicly read from the document, which carried the full weight of U.S. law, stating:

“The people of Texas are informed that, in accordance with a proclamation from the Executive of the United States, all slaves are free. This involves an absolute equality of personal rights and rights of property between former masters and slaves, and the connection heretofore existing between them becomes that between employer and hired labor.”

General Order No.3 was announced two years after President Abraham Lincoln issued the Emancipation Proclamation, which declared all enslaved people living within the Confederate states free. Lincoln’s proclamation meant little for the southwest until the Union accepted the Confederate leaders’ surrender on April 9, 1865.

News of the Emancipation Proclamation and the war’s end did not reach Texas until the day of Granger’s pronouncement, June 19, more than two months later.

Now celebrated as a federal holiday, festivities, remembrances, and educational events were held in Dallas over the last weekend, The Dallas Express reports, marking the end of chattel slavery in the United States.

The Juneteenth artifact, a ward of the Dallas Historical Society, was displayed in the Hall of Heroes inside the Hall of State building at Fair Park. It will remain available to be seen by the viewing public through the end of July.

The display will be open Tuesdays through Saturdays from 10 a.m. to 5 p.m. and Sundays from 1 p.m. to 5 p.m., per NBC 5.