Apollodorus of Damascus is the best-known architekton of the early second century AD, the era of Trajan and Hadrian. In the civil domain he is credited with planning and constructing prestigious projects in Rome itself, including Trajan's Forum and Baths; in the military sphere he bridged the Danube and wrote a Siege-matters treatise for his patron-emperor. Addressed (it is argued here) to Trajan rather than Hadrian, and with a view...