George Washington Parke Custis began Arlington House in 1802 on a prominent hill overlooking the Potomac and the new national capital. Designed with guidance from architect George Hadfield and completed in stages by about 1818, the mansion served as Custis's home and as a memorial to his step-grandfather, George Washington. Its commanding classical form made the private estate a public visual landmark.

Arlington was a plantation sustained by enslaved African Americans. Nearly one hundred enslaved people lived and labored on the estate over the decades before the Civil War, building the house, farming, cooking, cleaning, caring for children, and maintaining grounds. Their families, skills, resistance, and pursuit of freedom are central to the site's history, not a secondary addition to the Custis narrative.

Mary Anna Randolph Custis married Robert E. Lee, and Arlington became their family home. When Virginia seceded in 1861, the Lees departed and United States forces occupied the estate. The federal government levied taxes and seized the property. In 1864 military burials began there, in part to make the grounds unusable as a private residence, creating Arlington National Cemetery.

After the war, George Washington Custis Lee successfully challenged the government's seizure in court, then sold the property to the United States. The mansion underwent repeated military, museum, and restoration uses. Furnishings, finishes, service spaces, slave quarters, gardens, and cemetery surroundings therefore reflect different periods and preservation decisions rather than an untouched Lee household.

Arlington House is significant because plantation slavery, Washington commemoration, the Lee family, Union occupation, emancipation, and national military burial all converge there. Interpretation should resist presenting it only as a shrine to Robert E. Lee. Building archaeology, family papers, freedom claims, and descendant research can restore the experiences of enslaved residents. The house's preservation within a national cemetery makes it a powerful place to examine how Americans repeatedly revise public memory while living with the material consequences of slavery and civil war. Future work at Arlington House should begin with a source inventory that separates contemporary records, later recollections, physical evidence, and modern commemoration. A dated site plan can show relocation, rebuilding, lost features, and changes in ownership or use without presenting every period as one scene. Oral history can add valuable community knowledge, but it should be labeled and compared with documents where possible. Conservation decisions should protect original material, archaeological context, and respectful access while recording all interventions. This transparent method makes uncertainty visible, prevents a marker inscription from becoming the only authority, and gives future researchers a clear foundation for revising the account when stronger evidence appears.