Arlington County is a county in the Commonwealth of Virginia. The county is situated in Northern Virginia on the southwestern bank of the Potomac River directly across from the District of Columbia, of which it was once a part, under the name Alexandria County.The county is coextensive with the U.S. Census Bureau's census-designated place of Arlington. ...

The Glebe House, built in 1854–1857, is a historic house with an octagon-shaped wing in Arlington County, Virginia. The Northern Virginia Conservation Trust holds a conservation easement to help protect and preserve it. The name of the house comes from the property's history as a glebe, an area of land within an ecclesiastical parish used to support a parish priest.