Johannes Kelpius (1667–1708) was a German Pietist, mystic, musician, and writer, interested in the occult, botany, and astronomy, who came to believe with his followers in the "Society of the Woman in the Wilderness" that the end of the world would occur in 1694. This belief, based on an elaborate interpretation of a passage from the biblical Book of Revelation, anticipated the advent of a heavenly kingdom somewhere in the wilderness during that year. Kelpius felt that the seventeenth-century Province of Pennsylvania, given its reputation for religious toleration at the edge of a barely settled wilderness, was the best place to be. Philadelphia had been founded in 1682, but the city and the Province of Pennsylvania had quickly become a tolerant haven and refuge for many pietist, communitarian, or free-thinking groups who were leaving an intolerant Old World for the congenial religious climate of the British colony. Kelpius and his followers crossed the Atlantic and lived in the valley of the Wissahickon Creek in Philadelphia from 1694 until his death. It is reported that they lived communally, though they also spent time in solitary meditation in caves and small cells scattered about their common living quarters.