For a stretch of the tenth century, the most cultured city in Western Europe was in the south of Spain, and it was Muslim. To stand in Córdoba then was to stand at the centre of something — and the building that still tells you so, more than a thousand years on, is the one its builders raised first.
The Great Mosque of Córdoba
Abd al-Rahman I began the Great Mosque around 785, on the site of an older Visigothic basilica, traditionally remembered as the church of Saint Vincent. He did not live to see what it would become. Over the next two centuries his successors kept extending it southward and then sideways, each ruler adding to a building that already felt finished. Abd al-Rahman II enlarged the prayer hall in the ninth century. Al-Hakam II, in the 960s, gave it its most beautiful chamber — an ornate mihrab sheathed in gold mosaic, sent, by one account, as a courtesy by the Byzantine emperor, set beneath a ribbed dome that seems to float. Then al-Mansur, near the end of the century, pushed the hall outward one last time.
What they built together is still difficult to describe to someone who has not walked into it. You step out of the Andalusian sun and into a forest — row upon row of columns, hundreds of them, marching off in every direction until the walls disappear. The columns are mostly older than the mosque, Roman and Visigothic pieces gathered up and reused, which is why no two quite match. They were also too short. The builders' answer was the detail everyone remembers: they stacked a second tier of arches on top of the first to gain height, and striped the arch-stones in alternating red brick and white stone, so that the whole hall seems to ripple. Horseshoe arches below, round arches above, red and white repeating into the dark. A problem of engineering turned into the most recognisable interior in Spain.
Count the columns today and you reach somewhere around eight hundred and fifty — the guides will tell you eight hundred and fifty-six. At its medieval height there were more, perhaps as many as twelve or thirteen hundred. The original mosque of Abd al-Rahman I had only about a hundred and twenty. The building grew the way the city did.
A city at its peak
Around the mosque, Córdoba in the tenth century was something the rest of Europe had no real equivalent of. Under Abd al-Rahman III, who took the title of caliph in 929, and his son al-Hakam II, it became — in the cautious wording of the historians — the largest and probably the most cultured city in Europe, spoken of in the same breath as Constantinople. How large is honestly hard to say. Modern scholars tend to settle near a hundred thousand people; the old chronicles claim several times that, figures most historians now read as enthusiasm rather than census. The truthful version is simply that it was very large, and that nowhere nearby came close.
Nearby, Abd al-Rahman III had built himself a second city to rule from — Madinat al-Zahra, a palace-complex of terraces and gardens and reception halls begun around 936, a statement in stone that the caliphate of the west had arrived. It would be sacked and abandoned within a century. Its ruins are a World Heritage site now, dug slowly out of the hillside.
The city's real wealth, though, was quieter than its palaces. Córdoba ran on books. It is remembered as a place of libraries and copyists, of translation between Arabic, Latin, Greek and Hebrew, where a Jewish scholar-physician like Hasdai ibn Shaprut could rise to be the caliph's trusted minister and help oversee the Arabic rendering of a Greek medical classic. This was not a frictionless paradise — that version flatters the past. But there were stretches and arrangements, in that city in that century, that much of the world would not manage again for a very long time.
The library and its loss
The grandest emblem of all this was al-Hakam II's library. The figure usually quoted is four hundred thousand volumes, with a catalogue of titles said to fill forty-four volumes on its own. Take the number gently — it comes from medieval chronicles and cannot really be verified — but even halved, even quartered, it dwarfed anything in Christian Europe at the time, where a great monastery might count its books in the hundreds.
And then, a useful corrective to any golden-age daydream: not long after al-Hakam died, his powerful vizier al-Mansur, courting the conservative jurists whose support he needed, had much of that library's section on philosophy and the "ancient sciences" burned. The same century that built the library helped gut it. Splendour and its undoing, in two reigns.
What remains
Córdoba's caliphate did not last. It fractured in the eleventh century, and in 1236 the city fell to Ferdinand III of Castile. The Great Mosque became a cathedral, as conquered mosques did. Three centuries later, in 1523, a Renaissance nave was cut straight into the middle of the prayer hall — a cathedral planted inside the forest. Charles V is said to have regretted it when he saw what had been done, though the famous line attributed to him may be a later invention.
But the forest is still there. Walk in off the street today and the columns still stand where Abd al-Rahman's masons set them, the red-and-white arches still ripple off into the shadows, holding up a roof for prayers that moved elsewhere eight hundred years ago. Empires are loud and brief. Córdoba's lasted, in its full glory, barely a century. The pillars have lasted twelve. That is the thing worth carrying out of Andalusia: not the size of the moment, but how much of it, quietly, refused to disappear.