Was the Library of Alexandria really destroyed in a single catastrophic fire?

The answer

The popular image of the Library of Alexandria being destroyed in one dramatic fire is largely a myth. The library, founded around 283 BCE under Ptolemy II, likely declined over several centuries through multiple events. Julius Caesar's fire in 48 BCE may have burned warehouse books, not the main library. Christian mobs destroyed the Serapeum temple annex in 391 CE. The Arab conquest under Caliph Omar in 642 CE is another cited event, though many historians doubt this account. Scholar Mostafa El-Abbadi argues the library gradually withered as Ptolemaic funding declined and scholars dispersed. No single cataclysm destroyed it - neglect and politics did.