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Plan your visit to our museum, library, and conference center, located in the heart of Philadelphia’s historic district.

Science History Institute
315 Chestnut Street
Philadelphia, PA 19106-2702
Tel: 215.925.2222


We are within easy reach of Interstates 95 and 76, Philadelphia’s 30th Street Station, and the Philadelphia International Airport. See more details on public transportation, driving directions, and parking.


Take a journey through the weird and wonderful world of matter and materials. Visit our free museum and discover the chemistry in your life! The museum is open between 10:00 a.m. and 5:00 p.m. Tuesdays through Saturdays. And for a deeper dive into our permanent collection and exhibitions, take a guided tour.

Othmer Library

The Othmer Library houses over 140,000 print volumes, rare books and manuscripts, archival materials, and historical photographs. The library is open to researchers by appointment.

Conference Center

Perfect for meetings, conferences, holiday parties, and much more, our conference center can accommodate events for up to 300 people. Learn more about hosting an event.

Wheelchair Access

A wheelchair-accessible pedestrian gate is available at our parking-lot entrance on 3rd Street, between Chestnut and Market Streets. The pedestrian gate is unlocked during regular business hours and for events. If you’re traveling by car, drive up to the parking-lot gate, which will open automatically during regular business hours and events. You may park in any open spot marked “Visitor” or in one of two spots reserved for those with disabilities. To enter the building call our receptionist via the intercom at the East Entrance for visitors and staff.


Staying overnight? Our building is situated within walking distance of several hotels.