Volume 6 of The First Urban Churches reexamines preconceived understandings of the early church within Rome and the port city of Ostia. James R. Harrison introduces the material and documentary evidence of both cities. Seven additional essays examine a range of topics, including the Ostian Synagogue, the Letter to the Romans, and 1 Clement. The volume closes with an evaluation of the archaeological and ecclesiological arguments of Peter Lampe's From Paul to Valentinus, followed by Lampe's response.