Since 2001, Peter Lampe of the University of Heidelberg has directed annual archaeological campaigns in Phrygia, Turkey. During these interdisciplinary campaigns, together with William Tabbernee of Tulsa, numerous unknown ancient settlements were discovered and archaeologically documented. Two of them are the best candidates so far in the search for the identification of the two holy centers of ancient Montanism, Pepuza and Tymion, the sites of the expected descent of the New Jerusalem. Scholars had searched for these lost sites since the 19th century.