Baghdad
An illustrated Baghdad along the Tigris, with palm trees, blue domes and boats on the river, in a carved gilded arch.

Heart of
the Golden Age

Baghdad

762 — 1258

For five centuries, Baghdad stood at the centre of a Golden Age of learning.

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The journey

Follow the city from its founding on the Tigris to the hospitals, libraries, and scholars that made it one of the great centres of knowledge in history.

The story

Three Golden Ages

  • The round city of Baghdad on the Tigris

    I · 762–833

    Foundations

    A capital rises on the Tigris and begins gathering knowledge

  • A scholar reading at a desk

    II · 833–945

    The Flourishing

    Scholars translate, test, and invent as power shifts.

  • Scholars in conversation in a courtyard garden

    III · 945–1258

    Enduring Brilliance

    Learning becomes institutions, and books travel far beyond the city.

Hover an image to enter its age

Period I

762–833

Foundations

In seventy years, a new capital rose on the Tigris, drew people from across an empire, and began gathering knowledge from many languages.

The round city of Baghdad on the Tigris, with mountains on the horizon

01 · 750

A new centre for a new dynasty

In 750, the Abbasids overthrew the Umayyad dynasty and took control of a vast caliphate. Power was shifting east, and the new rulers wanted a capital that reflected it. They looked to Iraq, a land of old cities, near the former Sasanian capital of Ctesiphon. The question was where, exactly, to build.

Abbasid officials gather around a map on a low table beside the Tigris; one points across the river beneath a black banner

02 · 762

A river, a route, a decision

The answer lay on the Tigris. The river and the roads around it linked the site to farmland and to trade networks reaching far beyond Iraq: a steady flow of people, supplies, and ideas. In 762, the caliph al-Mansur began to build. Geography offered the opportunity; imperial ambition would turn it into a city.

762

A cargo boat and a camel caravan bring supplies to a Tigris landing beside farmland, while an official and a builder mark out the first foundations of a new city

CE · 145 AH

The year al-Mansur founded Baghdad—the starting point of its Golden Age, in a region settled long before.

CE = Common Era · AH = Hijri year (Anno Hegirae)

A city drawn as a circle

Al-Mansur named his foundation Madinat al-Salam, the City of Peace. No intact remains survive, so every picture of it is a reconstruction drawn from written descriptions. But the plan they describe is a statement of order: a great circle with the palace and the congregational mosque at its heart—a city designed to stand at the centre of an empire.

Walk through the plan

Part 01 of 04 · Walls

A city inside rings

Written accounts describe a moat and more than one wall around the circle, the main wall the thickest of all. Together they drew a hard line between the caliph’s city and the world outside.

Next · Gates

Part 02 of 04 · Gates

Four roads in

Four gates opened on the diagonals, each toward a different part of the empire. From each one an arcaded avenue ran through the ring of houses to the open centre.

Next · Mosque

Part 03 of 04 · Mosque

Faith beside power

The congregational mosque stood beside the palace at the centre, where the community gathered for Friday prayer.

Next · Palace

Part 04 of 04 · Palace

The heart of the circle

At the very centre stood the caliph’s palace under a great dome. Every ring and every road of the plan led here: a city drawn around its ruler.

Newcomers carrying books and woven goods meet in a street outside a city gate, beside a weaver at his loom
A busy arcade market beyond the city walls: carpet sellers, a potter, a bookseller and scholars under awnings, with boats on the river behind
Scholars at work in a library: a patron receives a book while a translator writes at a low desk
  • Byzantium Greek manuscripts
  • Khurasan · Samarkand Paper
  • Jundishapur Physicians
  • Harran Astronomers
  • Basra · Sind Spices, Indian astronomy

A capital that drew the world in

The circle could not hold for long. Markets, workshops, and neighbourhoods spread beyond the original enclosure as people arrived from across the empire, drawn by work at court and by trade. Baghdad became an Arabic-speaking metropolis with a strong Persian presence, and with the people came their skills and their knowledge. Skills and ideas needed patrons, and Baghdad had them.

Under Harun al-Rashid, who ruled from 786 to 809, the court commanded immense wealth; under al-Ma’mun, from 813 to 833, translation and scholarship won prominent support. A court needed physicians and experts in calculation, and a patron surrounded by scholars gained prestige. Officials and wealthy families followed, and many of them paid for one demanding task: translation.

How knowledge took root

Patronage paid for the work. What made it last were three things: careful translation, places to keep the books, and scholars who turned what they read into new methods.

Two scholars compare open manuscripts at a desk, with books and an astrolabe behind them

  1. Translation into Arabic

    Greek, Syriac, Persian, and Sanskrit learning began to flow into Arabic. A translator had to know the subject as well as the languages, and a damaged manuscript, an unfamiliar term, or a conflicting diagram could become a puzzle in its own right. Solving those puzzles turned translators into scholars.

  2. Homes for the books

    Books gathered in palaces, private houses, and institutions, among them the caliphal collection known as Bayt al-Hikma, the House of Wisdom. Historians still debate how it was organised; it was not a modern university. But it became a symbol of a growing culture of collectors, copyists, and readers.

  3. New methods: al-Khwarizmi

    In this world worked al-Khwarizmi. Writing in the early ninth century on algebra, arithmetic, astronomy, and geography, he set out systematic methods for solving equations in his Book of Algebra. “Algebra” comes from its key term, al-jabr; “algorithm” from a Latin form of his name. Two everyday words still carry his legacy.

End of Period I · 762–833

The patron is gone. The books stay

Dusk over Baghdad: on a rooftop by an oil lamp a scholar pauses over his manuscript while, far off along the Tigris, a procession with black banners leaves the city

In 833 al-Ma’mun died on campaign. Within three years the court had moved north to Samarra, and Baghdad would be without its caliphs for more than half a century. But what the city had gathered did not leave with them: the translators, the libraries, the new methods. In the century ahead they would be tested, argued over, and built upon.