The Thomas Jefferson Foundation (formerly the Thomas Jefferson Memorial Foundation) owns and operates Monticello, the mountaintop home of Thomas Jefferson and the only home in America on the elite World Heritage List of the United Nations. Incorporated in 1923, after the federal government waived its third opportunity to acquire Monticello for the nation, the Foundation purchased the house and land from the Levy family, stewards of the estate for 89 years. As a private, nonprofit organization, the Foundation receives no regular federal or state budget support for its twofold mission of preservation and education. Since 1923, the Thomas Jefferson Foundation has steadily expanded its role as a museum and educational institution. Its facilities now include the house and gardens on nearly 2,000 of Jefferson's original 5,000 acres; the Robert H. Smith International Center for Jefferson Studies next door at Kenwood, a headquarters for Jeffersonian research and teaching and home to the Jefferson Library; and the Thomas Jefferson Center for Historic Plants, which propagates heirloom varieties and makes them available to institutions and individuals. The David M. Rubenstein Visitor Center and Smith Education Center hosts state-of-the art exhibits for visitors of all ages. It serves as the gateway to Jefferson’s timeless Monticello, preparing guests for their trips to the historic mountaintop through dynamic content presenting fresh perspectives on Monticello and the enduring significance of Jefferson’s life and ideas. About a half a million people visit Monticello each year.

OSGF is an operating foundation dedicated to sharing the gifts and ideas of Rachel "Bunny"​ Mellon. Our mission is to support and inspire fresh thinking and bold action on the history and future of plants, including the art and culture of plants, gardens, and landscapes.

THE MONTPELIER FOUNDATION is a company based out of 11395 CONSTITUTION HIGHWAY, MONTPELIER STATION, Virginia, United States.

The George Washington Foundation is a 501(c)(3) non-profit organization, headquartered in historic Fredericksburg, Virginia. The Foundation operates George Washington's Ferry Farm and Historic Kenmore, the home of Fielding Lewis and Betty Washington Lewis. The mission of The George Washington Foundation is to enhance the public understanding and appreciation of the lives, values, and legacies of George Washington, Fielding and Betty Washington Lewis, and their families.

AHF was established in 1983 as a member-based, charitable 501(c)(3) nonprofit organization. We seek to educate future Americans to fully appreciate the sacrifices that generations of American Soldiers have made to safeguard the freedoms of this nation. Our funding helps to refurbish historical Army buildings, acquire and conserve Army historical art and artifacts, support Army history educational programs, research, and publication of historical materials on the American Soldier, and provide support and counsel to private and governmental organizations committed to the same goals. Two different Memorandums of Agreement with the Army (2009 and 2015) designated AHF as the official fundraisers for the National Museum of the United States Army. The 2015 MOA also turned over the construction and completion of the design to AHF. The Capital Campaign is committed to raising $200 million to build the Museum

Science is Everything. A world-class, interactive museum for families, students, and learners of all ages that will spark and sustain the natural curiosity in all of us.

The Shenandoah Valley Battlefield Foundation is working diligently to protect, preserve, and interpret battlefield land and surrounding properies. The efforts of loyal and dedicated staff at the SVBF are continually working toward furthering public awareness, education efforts, and comprehensive conservation strategies to maintain the quality of life in the Shenandoah Valley.. At the Shenandoah Valley Battlefield Foundation we strive to cultivate and maintain partnerships in order to protect these significant and historic hallowed grounds.

Oakridge Auction Gallery brings together buyers and sellers of fine, rare and valuable works of art, jewelry, antiques, and collectibles in a global marketplace. Whether it is conducting live auctions at its traditional Northern Virginia auction house in the Washington DC Metropolitan area or conducting online auctions through its modern virtual gallery, Oakridge Auction Gallery provides extraordinary service to both buyers and sellers alike. With its team of expert consultants from around the world, Oakridge Auction Gallery offers distinctive, unique, and beautiful items to selective museums and discerning collectors.