PHILADELPHIA (AP) — If the hip-hop Broadway smash "Hamilton" can reignite interest in the first U.S. treasury secretary, what will it take to drum up interest in another forgotten hero from America's fight for independence? The few who do come are a passionate bunch — usually tourists with Polish heritage or history buffs familiar with Kosciuszko's pivotal role in the American Revolution. [...] he kept busy playing chess, painting and entertaining a steady stream of dignitaries and visitors, including his longtime close friend Thomas Jefferson. Nearly two centuries after Kosciuszko lived at the boarding house, the building was purchased by Philadelphia philanthropist Edward Piszek, the son of Polish immigrants and co-founder of the Mrs.