Umayyad, Abbasid and Fatimid: The Early Caliphates Compared

Umayyad, Abbasid and Fatimid were three separate states with three separate ruling families, three capitals and — for part of their overlap — two incompatible claims to the same office. Calling the whole period "the Islamic empire" collapses several centuries of genuine political conflict into a single word.

The fastest way to keep them apart is by capital city, because in each case the choice of capital was the political programme.

Three capitals, three projects

This table gives the anchor for each, drawn from UNESCO inscriptions and Encyclopaedia Iranica.

Everything else — the sectarian identity, the economic base, the cultural output — follows from where each chose to sit and who it needed to keep loyal.

Umayyad Damascus: an old city with new rulers

Damascus was not a new foundation. UNESCO's inscription describes it as among the oldest continuously inhabited cities in the world, with excavations at Tell Ramad on its outskirts showing occupation between roughly 8,000 and 10,000 BCE, though it is not documented as an important city until the arrival of the Aramaeans.

What the Umayyads did was make an ancient Hellenistic and Roman city the seat of a new empire. UNESCO records the city's plan today as Roman, maintaining the aspect and orientation of the Greek city, with all streets running north–south or east–west. The earliest visible physical evidence on the ground is Roman.

The dossier's phrasing about the Umayyad period is careful and worth reading closely: the Umayyad caliphate "created Damascus as its capital, setting the scene for the city's ongoing development as a living Muslim, Arab city, upon which each succeeding dynasty has left and continues to leave its mark." Traces of the earlier Hellenistic, Roman and Byzantine cultures remain visible despite Islam's prevailing influence.

That is a description of layering rather than replacement, and it is the right frame for the Umayyad period generally: a new political order administering, at first, largely inherited institutions.

The Abbasid revolution came from the east

The most common misunderstanding about the change from Umayyad to Abbasid is that it was a palace coup in Syria. It was not.

Encyclopaedia Iranica's article by Clifford Edmund Bosworth is explicit about the geography. The establishment of the Abbasid dynasty in 132 AH / 750 CE was an event closely linked with Persia: the Abbasid daʿwa, the propaganda campaign made in the name of "a member of the House of the Prophet who shall be pleasing to everyone", had its origins and first successes in eastern Persia. At least one of the principal agents of the revolution, Abū Muslim Khorāsānī, was a Persian. The town and oasis of Marv in northern Khorasan — far from the Umayyad bases in Syria and from Iraq's garrison cities — was the epicentre of the campaign, and it was from there that Abū Muslim's forces marched west via Ray and the Jibāl to defeat Umayyad forces in Iraq.

Bosworth then does something a careful historian should. He notes that an older generation of scholars made what looked like an obvious deduction from these facts — that the Abbasid revolution was more than a mere change of dynasty — and treats that deduction as a position to be examined rather than a settled conclusion. The debate about how much actually changed in 750 beyond the ruling family is a live one.

For readers who like their causal arguments clean, this is a useful corrective, and it is the same problem worked through at length in why Rome fell: a datable event sits at the centre of a process whose extent scholars still argue about.

Samarra: the scale of Abbasid government

Baghdad is the Abbasid capital everyone names, but the site that survives best archaeologically is Samarra, on both banks of the Tigris about 130 kilometres to the north.

UNESCO describes it as the site of a powerful Islamic capital city that ruled over the provinces of the Abbasid Empire, extending from Tunisia to Central Asia, for a century. The dimensions alone are worth registering: the site runs 41.5 kilometres north to south, with a width varying from eight kilometres down to four.

A capital that size, occupied for roughly a hundred years and then largely left, is an exceptional archaeological resource — and a reminder that Abbasid government was a physically enormous undertaking. The same authority reached from North Africa to Central Asia, which is one end of the network described in the Silk Road for beginners and a substantial part of its middle.

Further west, UNESCO's inscription for Kairouan records the town as the most ancient Arabo-Muslim base of the Maghreb, founded in 670 CE, and capital of Ifriqiya for five centuries — a reminder that the caliphates governed through regional capitals with long independent histories of their own, not only from the centre.