Hadrianic Architecture and Geometry

All the threads of evidence point to the Greek world of the Hellenistic period as the fountain-head of the "ruler and compasses approach" to design, embodied in the centralized buildings of Hadrian's reign that represent one of the highwater marks of the "Roman architectural revolution." Analysis of the plans of six of these buildings in Rome, Tivoli and Baiae, some having an Imperial association, reveals how important geometrical principles were to advanced Roman architectural design.