Shiraz before Islam
Shiraz is most likely more than 4,000 years old. The name Shiraz is mentioned in cuneiform inscriptions from around 2000 BC found in southwestern corner of the city. According to some Iranian mythological traditions, it was originally erected by Tahmuras Diveband, and afterward fell to ruin.
In the Achaemenian era, Shiraz was on the way from Susa to Persepolis and Pasargadae. In Ferdowsi's Shāhnāma it has been said that Artabanus V, the Parthian Emperor of Iran, expanded his control over Shiraz. Ghasre Abu-Nasr (meaning "the palace of AbuNasr") which is originally from Parthian era is situated in this area. During the Sassanid era, Shiraz was in between the way which was connecting Bishapur and Gur to Istakhr. Shiraz was an important regional center under the Sassanians.