Daniel G. Van Slyke, S.T.L., Ph.D. is Associate Professor of Church History at Kenrick-Glennon Seminary in the Archdiocese of St Louis. He holds an M.A. in theology from the University of Dallas, an S.T.L. in theology from the University of St Mary of the Lake, and a Ph.D. in historical theology from Saint Louis University. With special interests in ancient Church history and Christian worship, Dr Van Slyke has lectured widely and taught courses both on the undergraduate and graduate level, as well as for ongoing adult education.