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Arlington remains an active military cemetery, averaging 5,400 funerals each year. More than 400,000 people have been laid to rest in an area covering 624 acres (2.53 km²). Veterans and military casualties from each of the nation's wars are interred in the cemetery, dating from the American Revolution. Pre-Civil War soldiers were re-interred at Arlington after 1900.
Arlington National Cemetery is administered by the Department of the Army. Arlington House, which is situated along the prominent ridges overlooking Washington, is operated by the National Park Service and serves as a memorial to Robert E. Lee. Arlington House was the pre-Civil War home of Lee and his wife, Mary Anna Custis Lee.
As a girl, she entered into a political marriage with Lothair II of Italy, who was later allegedly poisoned by the usurper Berengar of Ivrea. Berengar then attempted to force Adelaide to marry his son Athelbert. When Adelaide refused her consent and attempted to flee, Berengar imprisoned her, but she dramatically escaped with the help of a loyal priest by means of a tunnel under the walls of the castle where she was being held. Besieged by Berengar at the castle of her protector in Canossa, Italy, she sent a message to Otto I, the most powerful man in Europe, to rescue her, promising to marry him if he did so. After he came to her aid, they had a successful marriage with five children and eventually rose to the position of Holy Roman Emperor and Empress. She was known as a pious and generous queen, much beloved, but also extravagant in her charity to the point of endangering the kingdom's treasury.
She retired to Selz Abbey in Alsace and devoted herself to prayer and good works, believing that Christ would return around the year 1000. She died on December 16, 999, only days short of the millennium she thought would bring the Second Coming of Christ.