notes Kelpius Spring by so-called Cave of Kelpius photo of the Cave of Kelpius Cave of Kelpius New info on birth date Monks of Wissahickon The Legend of Wissahickon The Johannes Kelpius collection of German hymns, containing hand-written hymns by Kelpius and others, is available for research use at the Historical Society of Pennsylvania. American Christian religious leaders German Christian mystics German Christian religious leaders German emigrants to the Thirteen Colonies German-American culture in Philadelphia Musicians from Philadelphia People from Sighișoara People of colonial Pennsylvania Protestant mystics Radical Pietism Transylvanian Saxon people Wissahickon Valley Park 1667 births 1708 deaths 17th-century Christian mystics 18th-century Christian mystics