The period after Alexander the Great's death in 323 BC saw the spread of Hellenistic culture throughout the Mediterranean world. Many scientists and scholars accompanied Alexander's conquests and gained new knowledge from places like Egypt and the Near East. Ptolemy established the Library of Alexandria in Egypt in the early 300s BC, creating the largest library of the ancient world containing over 500,000 scrolls and sponsoring research. Scholars like Euclid, Eratosthenes, and Archimedes conducted pioneering work in fields like mathematics, astronomy, and physics. Philosophies also diversified during this period with schools of thought like Epicureanism emphasizing pleasure and Stoicism preaching self-control and indifference to pain or