Is it true that most of the scrolls at the Library of Alexandria were copied before it was burned down? And was the Baghdad House of Wisdom a bigger loss in knowledge?

So far no previous posts appear to have addressed the matter of the House of Wisdom, so there's an angle that further posts can explore. If You, the person reading this, know about the House of Wisdom, This Could Be Your Chance!

But that one library in the Nile Delta has a hugely overstated role in Popular Culture. u/XenophonTheAthenian explores just what we lost there, and also looks at just how we lose texts. (Spoiler alert: it's not because of catastrophic events.)