This book discusses various aspects of city gates in the Western Roman Empire: Italy, Spain, Gaul, Germany and Britain. In these countries many Roman city gates are to be found, sometimes still in a good condition, like the Porta Nigra in Trier and the Porta Appia in Rome. Similarly to medieval or early-modern city gates, Roman city gates did not all have the same design but show an evolution over time and depending on the circumstances.
