PART II INVESTIGATES THE Templum Pacis’ construction process. In particular, Chapter 6 outlines a reasonable chronology of the first building campaign (AD 71–75) and examines the materials that made it possible to complete (and eventually restore) the monument. Chapters 7 and 8 focus on the remains incorporated into the Monastery and Basilica of SS. Cosma e Damiano, and for three good reasons: first, they allow us to reconstruct what the halls located on the right-hand side of the Temple of Peace looked like, along with the characteristics of the porticoes; second, the surviving walls, although preserved from the foundation up to the cornice, are largely unpublished and have still much to reveal; third, scholarly access is highly problematic nowadays. My investigation relies on different approaches: not only a complete documentation of the standing structures (see my plans, sections, and elevations) and the scientific analysis of unusual building materials (as in the case of the red layer), but also the study of how and why these halls were designed and eventually altered. Later building phases, Renaissance drawings, and archival documents, too, greatly contribute to our knowledge of this sector of the Templum Pacis (see Volume 2). Roman architecture is not just a technological phenomenon, as demonstrated by the great hall, which was not part of Vespasian's Templum Pacis; the great hall was added when Domitian created the Library of Peace, which was remodeled in the fourth century when it became an audience hall (Chapter 10), and converted into a Christian basilica in the sixth century (Chapter 11). This architectural metamorphosis formed different living spaces that were clearly conditioned by social, cultural, political, and religious factors. I believe that this interdisciplinary approach was the right one in the study of a peculiar monument that underwent countless remodelings over the course of two millennia and survives in architectural fragments.