Step into the historic Stimson-Green Mansion for this new immersive experience!

In a world of glamour, mystery, and murder, it’s the Billionaires’ Club Annual Masquerade Ball. When a masked killer strikes, it’s up to you and your fellow guests to unmask the murderer before they disappear into the night.

With professionally trained performers spread across the Stimson-Green Mansion, you will have to explore the whole building to gather clues and find out whodunit. Masks and costumes are encouraged to help bring this glittering world to life!

⏰ Time: 7:30 pm — 10:00 pm

🎟️ Tickets: $50 for general admission

👤 Age Requirement: 21+ with valid ID (drinks available for purchase)

🚗 Parking: A first-come-first-serve lot is located beside the Mansion. Parking garage access is available for purchase at the ticket link.

General admission includes the immersive murder mystery experience plus delicious hors d’oeuvres. Add on memorable experiences like a live tarot card reading or a live watercolor portrait when you purchase your ticket. Even better, add a Tour ticket to join us at 6:30 pm for a small group tour of this stunning mansion, complete with a complimentary drink.

Bring your friends, bring your sleuthing skills, and definitely bring your costumes! This is a night you won’t want to miss.

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This event is part of our celebration of the Washington Trust for Historic Preservation’s 50th anniversary and the Stimson-Green Mansion’s 125th birthday. Learn more here.

Accessibility Considerations

For those planning to attend events at the Stimson-Green Mansion, we want to note some of the mobility challenges of this venue. As a historic home built in 1901, the Stimson-Green Mansion is ACA compliant but not ADA accessible.

There are stairs at each entrance. At the front door, the primary entrance to the house, there are six steps (with a railing) up to the front porch, followed by an additional step into the house. Once inside, there are three additional steps (with a railing) between the main event area and the bathroom.

If you have any questions about Mansion accessibility, please contact Public Programs Specialist Abby Armato at .