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The Mansion on O & O Street Museum

With over 100 rooms and 70 secret doors, The Mansion is one of the most unique properties in the world. We were named #1 for meetings and events by Event MB and one of the top five historic venues to explore by Smithsonian Magazine. We have also been featured in numerous television shows, books and magazines including the Travel Channel’s “Mega Mansions”, National Geographic's Traveler Magazine, The Washington Post and The Washingtonian.

Meticulously refurbished with style & imagination The Mansion resides on a quiet, historic, tree-lined street in fashionable Dupont Circle, within walking distance to The White House, Embassy Row and The Phillips Collection—minutes from Georgetown and the Lincoln Memorial. Built in the 19th & 20th centuries, The Mansion retains many period details (including original tiffany stained glass windows) and incorporates into the architectural features all the modern conveniences you need – including state-of-the art technology.

Ultra-private and secure, we offer a variety of themed rooms and suites, each uniquely decorated with fine art, antiques and furnishings purchased from around the world.

Having been a haven for heads of state, writers, foreign dignitaries, business leaders, artists, musicians, scientists, and members of the entertainment industry, we offer privacy, security, lodging, world-class cuisine and extraordinary service all in an environment that is nothing short of magical.

Largest Meeting Room Details
Capacity, Banquet-style: 160
Capacity, Theatre-style: 180
Meeting Space Details
Inside Reception Capacity: 300
Facility Amenities
Pets, Show as Hotel, Cable, Wifi in the room, Iron/Board, Kitchenettes, Microwave Oven, Refrigerator, Separate Dressing Area, A/V Equipment, Easels, Fax, Flip Chart, Business Center, Complimentary Breakfast, Concierge, Laundry Service, Room Service, Breakfast, Dinner, Lunch, Group Dining, ADA Compliant, Guided tours available, Private Tour, ADA compliant, Woman Owned
Private Rm Capacity
Seating Capacity
Group Maximum
Attraction Rates
$13 to $30, $31+
Length of Tour
1-2 Hours
Metro Station
Dupont Circle
Payment Options
American Express, Discover, MasterCard, Visa
2020 O St. NW
Washington, DC 20036
Dupont Circle

(202) 496-2000 or reservations () omansion ! com