Arlington National Cemetery in Arlington County, Virginia, is a military cemetery in the United States of America, established during theAmerican Civil War on the grounds of Arlington House, formerly the estate of the family of Confederate general Robert E. Lee's wife Mary Anna (Custis) Lee, a great grand-daughter of Martha Washington. The cemetery is situated directly across the Potomac River from theLincoln Memorial in Washington, D.C.. It is served by the Arlington Cemetery station on the Blue Line of the Washington Metro system.
In an area of 624 acres (2.53 km), veterans and military casualties from each of the nation's wars are interred in the cemetery, ranging from the American Civil War through to the military actions in Afghanistan and Iraq. Pre-Civil War dead were reinterred after 1900.
The Tomb of the Unknowns at Arlington National Cemetery is also known as the Tomb of the Unknown Soldier. It stands on top of a hill overlooking Washington, D.C.
One of the more popular sites at the Cemetery, the tomb is made from Yule marble quarried in Colorado. It consists of seven pieces, with a total weight of 79 short tons (72 metric tons).
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