A city of caves, temples and tombs, Petra gains its nickname from the pink sandstone from which it was carved. In this second part of his conversation with Tristan, Professor David Graf, who directed excavations in the ancient Nabataean city, describes the finer details of the architecture and artefacts found there. David and Tristan discuss Petra’s position on trade routes, its leadership and culture and whether, after becoming a client kingdom of Rome in the 1st century BC, and being annexed in 106 AD, much changed for the city. Did the Nabataeans maintain any autonomy or individuality? And what was to lead to Petra’s slow demise?