Temple Hall is an early 19th-century Federal-style mansion and working farm near the Potomac River north of Leesburg in Loudoun County, Virginia.

[5] The estate became a hub of Leesburg society[6] and was visited by Gilbert du Motier, marquis de Lafayette during his grand tour of the United States on 9 August 1825.

[5][6][7] Altogether, Mason and his wife, Ann Eliza Carroll, raised ten children at Temple Hall.

[9] They became the largest suppliers in the eastern United States until the popcorn market collapsed after World War II.

[9] Afterwards, the Symingtons turned to raising livestock, including cattle and hogs, as well as wheat, corn, and hay for animal feed.

[9] Concerned about Loudoun County's rapid development and population growth, Mrs. Symington donated the 286 acre[10] farm to the Northern Virginia Regional Park Authority (NVRPA) in 1985.

[5] A small Doric portico shelters the central entrance which is surmounted by a graceful semicircular fanlight.