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Also known by its original ancient name, Peroz-Shapur, was an ancient and medieval town that was briefly became the capital of the Abbasid Caliphate.
Anbar was an ancient and medieval town in central Iraq. It played a role in the Roman–Persian Wars of the 3rd–4th centuries, and briefly became the capital of the Abbasid Caliphate before the founding of Baghdad in 762. It remained a moderately prosperous town through the 10th century, but quickly declined thereafter. As a local administrative centre, it survived until the 14th century, but was later abandoned.
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