- The Romans divided the Arabian Peninsular into three areas, Arabia Felix, Arabia Deserta and Arabia Petrae.
Arabia Felix (Happy Arabia)
- This was Southern Arabia, the Yemen: It was divided amongst 4 main Kingdoms all of which had advanced hydraulic systems in place.
- Sabaean Kingdom (Yemen)
- with the capital at Marib, then later, at Sana (Sanaa). This was the most powerful Kingdom.
- Kingdom of Ma’in
- with the capital at Timna, which controlled the Incense Road.
- Kingdom of Hadramaut
- with the capital at Sabwa. They traded Incense and Cinnamon traded through their Port of Cana (Mukalla).
- Kingdom of Zufar (Oman)
- their capital was the lost city of Ubar of which nothing is known.
- Sabaean Kingdom (Yemen)
Arabia Deserta (Desert Arabia)
Arabia Petraea
- The northwestern part of Arabia, which was ruled from Petra, and covered modern Jordan and southern Syria.
- The former Nabataean Kingdom had been based on Petra, which was adjacent to the King's Highway, the route between Mesopotamia and Egypt.
Arabian Peninsular