As per the State Museum website: Mobility: Free wheelchairs (3 sizes) are available free of charge inside each entrance, first-come, first-served. All floors are accessible by elevator. Seating in about every third gallery. Adjustable height canes with rubber tips available. The Museum Café and Store are barrier-free. For more information about accessibility: https://www.philamuseum.org/accessibility/
You can give them a call and ask. I don't recall seeing any, but I wasn't looking either. Sorry I can't be more help.
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