Robert E Lee married Mary Anna Randolph Custis (1808–73), great-granddaughter of Martha Washington through her first husband Daniel Parke Custis, and step-great-granddaughter of George Washington (1st President of the US.) Born in 1781, George Washington Parke Custis was the grandson of Martha Dandridge Custis Washington through her first marriage. After his natural father, John Parke Custis, died in 1781, G.W.P. Custis went to live at Mount Vernon where George and Martha Washington raised him as their own son. During his childhood, Custis became very attached to his stepfather, George Washington. In 1802, Custis started the construction of Arlington House on land that he had inherited from his natural father. When completed in 1818, he intended the house to serve as not only a home but also a memorial to his stepfather, George Washington. In 1804, Custis married Mary Lee Fitzhugh. The two had four children, but only one, Mary Anna Randolph Custis, survived.