Drawing by George Washington of his design for 16-sided barn was included with his letter of October 28, 1792, to Anthony Whiting, estate manager for Mount Vernon farms.
Dogue Run Farm, on which 16-sided barn was sited, was located in northwestern sector of Mount Vernon landholdings.: Public Domain, via Library of Congress/American Memory @ http://memory.loc.gov/mss/mgw/mgw4/102/0800/0823.jpg
ca.1801 map based upon map drawn by George Washington and included in letter dated December 12, 1793, to English agriculturist and economist Arthur Young (September 11, 1741 – April 12, 1820).
Dogue Run Farm, site of 16-sided barn, is located in northwestern sector (upper right).
Letters from His Excellency George Washington, to Arthur Young (London, 1801): No known copyright restrictions, via Library of Congress, Geography and Map Division @ https://www.loc.gov/item/99466780 (digital ID: https://www.loc.gov/resource/g3882m.ct000367/)
barn interior: view of treading floor
1996 replica of George Washington's 16-sided treading barn, Mount Vernon Pioneer Farm site: Galen Parks Smith, CC BY SA 3.0, via Wikimedia Commons @ https://commons.wikimedia.org/wiki/File:GW_treading_barn_int1.JPG
1996 replica of George Washington's 16-sided barn and associated stables and corn houses: four-acre Pioneer Farm site
Mount Vernon, Fairfax County, northern Virginia: Galen Parks Smith, CC BY SA 3.0, via Wikimedia Commons @ https://commons.wikimedia.org/wiki/File:GW_Pioneer_Farmer_site1.JPG
1996 replica of George Washington's 16-sided barn: interior of roof evokes admiration for George Washington's ingenuity and for Thomas Green's skill.
"Wooden Splendor": Rob Shenk, CC BY-SA 2.0, via Flickr @ https://www.flickr.com/photos/rcsj/7428328774/
1996 replica of 16-sided barn designed by George Washington, Mount Vernon, Virginia
view of access to treading floor
c.1980-2006 photo by Carol M. Highsmith (born 1946); Library of Congress Prints & Photographs Division, Carol M. Highsmith Archive: No known restrictions on publication, via Library of Congress Prints & Photographs Online Catalog (PPOC) @ https://www.loc.gov/pictures/item/2011631437/
Mount Vernon viewed from the Maryland side of the Potomac River
Mount Vernon, Fairfax County, northern Virginia: baldeaglebluff, CC BY SA 2.0, via Wikimedia Commons @ https://commons.wikimedia.org/wiki/File:MTVernonseenfromtheriver.jpg