Collingwood (mansion)

The mansion was first built in 1859 on a subdivision of George Washington's former River Farm, and significantly altered and expanded in the early 20th century.

[1] The property was purchased by George Washington in 1760 and formed an outlying part of his Mount Vernon estate known as River Farm.

[1] In 1859, a 652-acre (264 ha) part of River Farm was sold to brothers Stacey, Isaac, and William Snowden, who subdivided the property further.

"[6] The house was then remodeled as a two-story Colonial Revival by Natalie Yates, who added the portico and columns, and operated it as a tea room and restaurant.

[7] The mansion was purchased by the National Sojourners for use as their headquarters in 1977, and they inaugurated the Collingwood Library and Museum on Americanism on the site.

[8] The library contained about 7000 books on military history and had copies of the US constitution and a "near complete set of the writings of George Washington".