We know that in the early Sasanian period, the empire showed a great interest in establishing ports on the coast of the Persian Gulf. In the Karnamag of Ardashir Papagan (Book of Deeds of Ardashir son of Papak), one of these ports is mentioned, and it is called "Bōxt-Artaxšīr", which is modern-day Bushehr. This port was important for the Sasanians because it linked Kazerun to center of Persis, modern-day Shiraz.