For almost 90 years, Monticello has been maintained and kept open to the public by the Thomas Jefferson Foundation, Inc., which owns over 2,500 acres of Jefferson's 5,000-acre plantation. As a private, nonprofit 501(c)3 corporation, the Foundation receives no ongoing federal, state, or local funding in support of its dual mission of preservation and education.
In 1923, Monticello was purchased by the Thomas Jefferson Foundation, a private nonprofit corporation and was opened as a public attraction in 1924. Since then, the Foundation has instituted numerous research and educational programs and major restoration and renovation projects, and Monticello has attracted more than 27 million people.
Today, the Thomas Jefferson Foundation remains committed to a twofold mission:
preservation -- to conserve, protect, and maintain Monticello in a manner which leaves it enhanced and unimpaired for future generations -- and
education -- to interpret and present Thomas Jefferson to the widest possible audiences, including scholars and the general public.
Monticello is a National Historic Landmark and the only house in the United States designated a UNESCO World Heritage site.