Donald Trump wants to use the NPS as a propaganda machine to spread his misguided version of history.

Clearly the Trump Administration wants a war. They are insistent upon MISLEADING and UNTRUTHFUL telling of history. Its time we start really protesting and shut-down Philadelphia in preparation for the semiquincentennial. Come to INHP on Saturday between 12 and 4pm as we tell the REAL HISTORY of America and the President’s House. We will continue …

David Rittenhouse wrote an almanac in 1747

David Rittenhouse had a long and varied career.  He was, of course, Philadelphia’s most celebrated astronomer but he was also a clockmaker, an inventor, the treasurer of the Continental Congress, City Surveyor of Philadelphia, and founder of the US Mint. His masterful 1771 Orrery was the state of the art in teaching celestial mechanics for first half …