Hubby and I were Not Impressed by redeveloped faux-attraction in Philadelphia called Penn's Landing. The silver lining -- as we made our escape -- was coming across a small memorial to the Schwenkfelders.
Radical and persecuted in their own day, the Schwenkfelders walked a middle ground among the warring Reformation sects in a way that anticipated later ecumenism. Unlike other immigrant churches, the Schwenkfelders never spread past the environs of Philadelphia -- in case you've never heard of them -- and never grew past a handful. About three thousand in six churches today.
Schwenkfelder Library (N.B. They hold some of the only surviving manuscripts of Universalist George de Benneville. )