United States v. Lee (1882)
With local cemeteries in Alexandria County and Alexandria filling rapidly with war dead, Quartermaster General of the United States Army Montgomery C. Meigs proposed using of the Arlington estate as a cemetery. The first burial there was made on May 13, 1864. United States Secretary of War Edwin M. Stanton approved the establishment of a military cemetery on June 15, 1864, creating Arlington National Cemetery. By the end of the war in April 1865, more than 16,000 people had been buried at Arlington. In September 1866, a memorial and a burial vault (containing the remains of 2,111 U.S. and Confederate soldiers who died at the First Battle of Bull Run, Second Battle of Bull Run, and along the Rappahannock River) were buried in Lee's former wildflower garden on the mansion's east side beneath the Civil War Unknowns Monument, a memorial to honor unknown soldiers who had died during the American Civil War.
Arlington National Cemetery
Before the Arlington Memorial Amphitheater was completed in 1921, important ceremonies were held at what is now known as the "Old Amphitheater." This structure sits where Robert E. Lee once had his gardens. The amphitheater was built in 1868 under the direction of Civil War General John A. Logan. Gen. James A. Garfield was the featured speaker at the Decoration Day dedication ceremony, May 30, 1868, later being elected as President of the United States in 1881. The amphitheater has an encircling colonnade with a latticed roof that once supported a web of vines. The amphitheater has a marble dais, known as "the rostrum", which is inscribed with the U.S. national motto found on the Great Seal of the United States, "E pluribus unum" ("Out of many, one"). The rostrum was designed by General Montgomery C. Meigs, then Quartermaster General of the U.S. Army. The amphitheater seats 1,500 people and has hosted speakers such as William Jennings Bryan.