All the books of the known world in one place.
With collections of works, lecture halls, meeting rooms, and gardens, the library was more than a book shelf and part of a larger research institution called the Musaeum of Alexandria, where many of the most famous thinkers of the ancient world studied.
the Library stood for 6 centuries and was built in the 3rd century BCE by Ptolemy I Soter, who was a Macedonian general and the successor of Alexander the Great. This was a period called the Ptolemaic dynasty in which since alexander, was named Hellenistic Egypt which lasted until the death of Cleopatra and the Roman conquest in 30 BCE.
The Ptolemy were very proud of the library and took on the job of collecting for the centre of knowledge. Often people would come forward with their version of older literary work and some times agents were sent off to find and buy new texts. Aristotle himself donated his whole library when he died, to the library of Alexander as people did in those times.
So serious was the decree for knowledge every time a boat pulled into the Harbor it was searched for books, and if it was one not in the library it would be confiscated and the owner compensated.
All the books were hand written and most of the books were kept as papyrus scrolls,which lasted until the Roman conquest of Egypt when it was burnt and looted by Julius Caesar in 48 BC, later attacked by Aurelian in the AD 270s, and its final demise was at the decree of Coptic Pope Theophilus in AD 391.
When the main library was rubble, Ancient scholars used a "daughter library" in a temple known as the Serapeum, located in another part of the city. According to Socrates of Constantinople, Coptic Pope Theophilus destroyed the Serapeum in AD 391.
Engineering an Empire - Greece: Age of Alexander
With Peter Weller
The Hidden Library Of Alexandria - Ancient Mystery Documentaries ~
What do we believe was in the Library?
Astronomy All the stars in the sky and the colour of Uranus although modern man only confirmed its colour in 1972 (from Sumerian knowledge) The zodiac and its place as a marker of time. The importance of the equinox for farm planning.
Medicine. Egyptian medicine wasn't so bad. After all they had been embalming bodies for 4 thousand years.
Agriculture & Farming systems from the workings of the hanging gardens of Babylon to the crop rotation system and general growing. The Sumerian used flood gates to sustain fertile crops, this and more were in the Library.
Plays songs prose
Make-up, Fashion Clothing
Animals of the known worlds and possible extinct species records.
Religion, the first Greek translation of the Torah into Greek happened in the library .
Maths including Pi and Phi and geometry
Science Chemicals and recipes
The Natural World The size and shape of the EARTH. When Eratosthenes first worked out how to calculate the shadows to give the circumference of the earth, he said the earth was 24 650 miles round he was only out by 200 miles, because he didn't realise the dip the earth has at both its poles.
Arts Weaving, painting, song, music, music maths, Plays.
Mechanics plans schematics and instructions for working inventions, automaton (robots) steam engines
War war machines, armour, weapons, stratergy, killing techniques.
Ancient Egypt: Medicine and History