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According to a medieval legend, the library of 
Alexandria was destroyed on the orders of the

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Caliph Omar. There were so many books, the story 
goes, that the only way to dispose of them was to

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use them as fuel in the city’s 4,000 bathhouses. 
So into the furnaces they went, day after day,

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week after week, the wit and wisdom of a 
thousand years going up in smoke, and bits of

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blackened books raining on the weary rooftops of 
Alexandria. It took six months to burn them all.

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This never actually happened. Even if the 
Caliph had wanted to destroy Alexandria’s books,

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he would have found few to burn. By his time, 
the library had already vanished, and was already

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shrouded in mystery. That mystery endures. 
The library’s site has never been discovered,

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and is unlikely to ever emerge from 
its concrete tomb beneath the modern

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metropolis. Many of the questions that surround 
it can never be answered. But in this video,

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I hope to at least contextualize the 
significance of the Library’s loss.

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The Library of Alexandria was established 
around 300 BC by Ptolemy I. Ptolemy,

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once a companion of Alexander the Great, 
had established himself as king of Egypt,

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with the bustling seaside metropolis of 
Alexandria as his capital. By collecting texts

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and intellectuals, Ptolemy hoped to 
burnish the reputation of his kingdom

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and capital throughout the Greek world. To 
those ends, he offered generous stipends

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to any famous scholar who would join his 
court, and began aggressively acquiring books.

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Ptolemy’s library was part of Museion, a sort 
of proto-university that stood beside the royal

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palace. The Museion seems to have consisted 
of a courtyard surrounded by shady stoas and

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lecture halls, and included a dining room 
where the resident scholars took meals. The

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storerooms and reading rooms of the library were 
apparently attached to the main Museion complex.

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Ptolemy’s son and grandson expanded the library,

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sending scholars and agents to scour the 
markets of the Greek world for new purchases.

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Their bibliomania was so intense, supposedly, 
that ships arriving in Alexandria were compelled

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to surrender all books on board for copying. The 
library soon swelled to gargantuan proportions.

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Some ancient authors claimed that it contained 
700,000 books – books, in this context, meaning

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papyrus scrolls. We don’t know the actual number, 
but it’s generally assumed that it was far lower.

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Those inclined to minimize 
the size of the library,

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however, should keep in mind that some ancient 
scholars were extremely prolific. For example,

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the Alexandrian scholar Didymus, nicknamed 
“bronze-guts” for his inhuman work ethic,

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reportedly produced nearly 4,000 
books over the course of his lifetime.

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The scholars who worked in the library under the 
early Ptolemies became famous throughout the Greek

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world. It was here that the circumference of the 
Earth was first calculated, that the standard

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texts of the Homeric poems were established, and – 
appropriately – that the first library catalog was

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devised. Like tenured academics in every era, the 
scholars of the library also spent a great deal of

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time and energy attacking one another over points 
of pedantry, a habit that earned the Museion

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the nickname “birdcage of the Muses.”
The great library declined under the later

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Ptolemies, who had less money and less inclination 
to spend that money on squabbling scholars. But it

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was in 48 BC, and at the hands of Julius Caesar, 
that the library suffered its first disaster.

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Caesar, fresh from his victory over Pompey, had 
become involved in a civil war that pitted the

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famous Cleopatra against her brother, Ptolemy 
XIII. When Ptolemy’s forces tried to seize a

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fleet moored Alexandria’s harbor, Caesar ordered 
the ships burnt to keep them out of enemy hands.

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Unfortunately, the fire spread from the 
docks to the adjacent palace quarter.

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According to some ancient authors, 
the flames destroyed the library.

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Others authors claim that only a 
portion of the collection was destroyed.

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It’s sometimes theorized that the books destroyed 
were not in the main library, but in harbor

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warehouses. It seems most likely, however, that 
at least part of the library really was destroyed.

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Only a few years later, Mark Antony is said to 
have given Cleopatra 200,000 books from Pergamum.

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A gift of this magnitude would only make sense 
if the Alexandria library had been depleted.

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The Library continued to operate 
during the Roman imperial era.

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Though no longer a hotbed of original research, 
it seems to have remained accessible to scholars,

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and was apparently subsidized by the Roman 
administration. During the third and fourth

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centuries AD, however, Alexandria experienced a 
massacre, an invasion, a civil war, and a tsunami,

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any or all of which might have destroyed the 
library. By the end of the fourth century,

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if not sooner, the palace quarter, in which the 
main library was located, was mostly abandoned.

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Ptolemy II had established a branch of 
the library, accessible to the public,

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in the marble porticoes surrounding the Temple of 
Serapis. But in 391, amidst savage street warfare

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between Christian and pagan mobs, the temple was 
demolished. The stoas that sheltered the library

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were not destroyed, and would in fact survive 
until the Middle Ages. But since we hear nothing

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more about the books, it’s often assumed that 
they were damaged or dispersed at this time.

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We don’t know, in short, exactly when the great 
library in the palace and the branch library in

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the Serapeum were destroyed. But there 
is no clear evidence for large libraries

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after the fourth century; and by the time of 
the Arab Conquest, the library of Alexandria

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was probably no more than a distant memory. 
Disasters must have destroyed many of the books.

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But the greatest culprit was probably simple 
decay. The library of Alexandria was dependent on

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sustained elite patronage and investment – first 
from the Ptolemies, and eventually, it seems,

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from the Roman administration. When this patronage 
dried up, and when the texts ceased to be cared

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for and recopied, the scrolls of the library 
simply rotted away in Alexandria’s humid air.

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So: how much was lost with the Library of 
Alexandria, and how significant were these losses?

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At the risk of making an obvious 
point, the Library of Alexandria

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was not the only library in the classical world. 
There were hundreds of others, some very large.

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Only the most obscure works in the Library of 
Alexandria were not represented by other copies

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elsewhere. It’s only because the Library of 
Alexandria’s decline was symptomatic of the

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broader decline of classical culture – because, 
in other words, all the ancient world’s libraries

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fell into decay at the same time – that 
so many works were lost in late antiquity.

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It’s sometimes said that the destruction of 
the Library of Alexandria set civilization back

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by centuries. This is a wild exaggeration. The 
scrolls in the library did not contain the bases,

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as is sometimes claimed, for great advances in 
science and technology. Although there certainly

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many works of mathematics and physics in 
the library, the most important of these

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were widely disseminated elsewhere. 
What perished with the library were,

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overwhelmingly, lesser-known works of literature 
and philosophy, commentaries and monographs,

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all the residue and introspection of an 
extremely sophisticated literary culture.

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These works would be a treasure beyond price 
for scholars of the classics, but they were

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not the stuff of a foreclosed modernity.
Before we close, I’d like to talk briefly

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