What is “a caliphate”?

The story behind the answer

It denotes a political realm led by a caliph—“khalīfa,” Arabic for successor—who was seen as the Prophet Muhammad’s successor in guiding the community. This leadership combined religious authority with temporal power, distinguishing it from a council of scholars (ulama) or a purely spiritual, non-political role. While many were hereditary dynasties, a dynasty is the ruling family, not the institution itself.

In the Middle Ages, major examples included the Umayyads and, especially, the Abbasids in Baghdad (750–1258), under whom Islamic civilization flourished in administration, trade, and learning (think House of Wisdom). Over time, real power often shifted to emirs and sultans, leaving caliphs with symbolic clout, and later claimants—from the Abbasids in Mamluk Cairo to the Ottomans—used the title to legitimize rule across the Muslim world.