Tübingen 1999. External links with further reading. Johann Georg Rapp in the German-language in ADB volume 27 page 286 - 289 with further reading. 1757 births 1847 deaths 18th-century alchemists 18th-century apocalypticists 18th-century Christian mystics 19th-century alchemists 19th-century apocalypticists 19th-century Christian mystics Founders of utopian communities German alchemists German Christian religious leaders German emigrants to the United States Lutheran pacifists People from Beaver County, Pennsylvania People from Enzkreis People from New Harmony, Indiana People from the Duchy of Württemberg Protestant mystics Radical Pietism