No secret hoard, but a real achievement
There is no known hidden treasure of the Library of Alexandria: no sealed vault, secret chamber or surviving cache of lost books has been found, and the precise location of the main library buildings is not established. The library’s real significance lies elsewhere, in an attempt to gather and organise the written knowledge of the Greek-speaking world, and in the scholarly work that followed. Its decline was also slower and less dramatic than the popular story of a single catastrophic fire.
Origins
The library was part of the Mouseion, a research institution in the royal quarter of Alexandria, founded by the early rulers of the Ptolemaic dynasty. Ancient tradition credits Ptolemy I Soter and his son Ptolemy II Philadelphus in the early third century BCE, with Demetrius of Phaleron, an Athenian exile, often named as an adviser. Details of the early years come from writers who lived long afterwards, so they should be treated with some caution.
The Mouseion supported resident scholars who were paid from royal funds, a notable arrangement in antiquity. The library was a tool of royal prestige as well as scholarship. Ptolemaic Alexandria was a new city, and a great collection of books helped to present it as a rival to Athens.
How the scrolls were collected
Books at this time were papyrus scrolls, copied by hand, and each work might fill several scrolls. Ancient sources describe an aggressive acquisition policy. According to the physician Galen, writing centuries later, Ptolemy III borrowed the official Athenian copies of the plays of Aeschylus, Sophocles and Euripides, paid a large deposit, and then kept the originals and returned copies. Other stories say that books found on ships docking at Alexandria were seized, copied and sometimes kept, with the owner receiving the copy. These anecdotes may contain truth, but they were told and retold, and not every detail is reliable.
Collecting also meant buying, commissioning copies and sending agents abroad. The aim was to assemble texts of poetry, drama, history, medicine, mathematics and philosophy, and also works translated into Greek from other languages. A well-known tradition holds that the Hebrew scriptures were translated into Greek at Alexandria, giving the Septuagint, though the details are legendary.
Cataloguing and scholarship
A collection is only useful if it can be navigated. Callimachus, a poet and scholar active in the third century BCE, is traditionally credited with a catalogue called the Pinakes, which organised authors by genre and listed their works. It does not survive as a whole, but later writers refer to it, and it is considered an early step toward systematic bibliography.
Scholars at Alexandria also edited texts. Zenodotus of Ephesus, traditionally the first head of the library, and later Aristophanes of Byzantium and Aristarchus of Samothrace, compared manuscripts of Homer and worked on the text of poetry. Their decisions about the wording of the Iliad and the Odyssey shaped the versions we read today. In the same environment, Eratosthenes estimated the size of the Earth by an ingenious method, and Herophilus and Erasistratus are credited with anatomical work, while scholars also studied the Hippocratic Corpus and other medical writings.
How many scrolls?
Ancient figures range from several tens of thousands to hundreds of thousands, with some sources claiming around 400,000 or even 700,000 scrolls. These numbers are not trustworthy. They may count scrolls rather than separate works, may include duplicates, and may have been inflated for effect. A safe statement is that it was probably the largest collection of its time, with a very large number of scrolls, but the real total is unknown.
The library was probably not the only one of its kind. The Attalid kings of Pergamon built a rival, and the Pergamon library is reported to have been a major collection in its own right. Later Roman imperial libraries and city libraries, such as the Library of Celsus at Ephesus, continued the tradition on different terms.
A slow decline
Several events are linked with damage to the library, but no single one is established as its end.
- In 48 BCE, during Julius Caesar’s war in Alexandria, fire spread in the harbour area. Ancient writers disagree about what burned. Some mention books being lost, possibly warehouse stocks near the docks, and others suggest the main library survived.
- In the second century BCE, political turmoil under Ptolemy VIII led to the expulsion of scholars from Alexandria, which harmed the intellectual life of the institution.
- In the 270s CE, fighting under the emperor Aurelian devastated the royal quarter where the Mouseion probably stood.
- In 391 CE, the Serapeum, a temple that housed a daughter library, was destroyed during religious conflict. Whether many books were still there by then is uncertain.
The story that the Arab conquerors burned the library in 642 CE appears centuries later in the sources and is generally regarded as unreliable.
Underlying these events were other factors: shrinking royal support under the later Ptolemies and under Roman rule, changing intellectual priorities, and the fragility of papyrus, which decays unless it is recopied. Scrolls survive only in dry conditions, as the Dead Sea Scrolls show, and a library in a humid port city depended on constant copying. The fall of Rome in the west in later centuries also reduced the resources available to preserve such texts.
What survives
Almost no Alexandrian scrolls survive as such. What we have instead are the texts that were copied and recopied through later centuries, including Homeric poems and Greek tragedies, along with commentaries and papyrus fragments recovered from Egyptian sites. The influence of the Alexandrian scholars is therefore preserved in the way texts were edited, divided into books and discussed. The Pharos lighthouse and the library stand together in modern memory as symbols of Ptolemaic Egypt’s ambition, even though neither survives.
The modern Bibliotheca Alexandrina, opened in 2002, honours the memory of the ancient institution. It is a new library, not a rebuilt ancient one.