Glenstone

Glenstone is a private contemporary art museum in Potomac, Maryland, founded in 2006 by American billionaire Mitchell Rales and his wife Emily Wei Rales. The museum's exhibitions are drawn from a collection of about 1,300 works from post-World War II artists around the world. It is the largest private contemporary art museum in the United States, holding more than $4.6 billion in net assets, and is noted for its setting in a broad natural landscape.

Glenstone's original building was designed by Charles Gwathmey, with it being expanded several times on its 230-acre (93 ha) campus. Its most significant expansion was finished in the late 2010s, with outdoor sculpture installations, landscaping, a new complex designed by Thomas Phifer, and an environmental center being added.