National Constitution Center

This guide to the National Constitution Center in Philadelphia opens with the building's own hidden calendar, from its groundbreaking on the two-hundred-thirteenth anniversary of the Constitutional Convention to bronze delegates frozen mid-argument in Signers' Hall. You'll meet holdouts like George Mason and Elbridge Gerry, and stand before a replica of George Washington's chair, carved with a sun that Benjamin Franklin stared at all summer, unsure if it was rising or setting. Check the carving yourself and see what you make of it.