Excerpts from Books and Wikipedia
Included rectangular pattern and island of Pharos creating a double harbor; [Grammar of Ancient World, p. 15] "One of the Seven Wonders of the World, the Pharos (lighthouse) of Alexandria was built around 280 BCE by Sostratus of Cnidus possibly for Ptolemy I of Egypt, though it was finished during the reign of his son, Ptolemy II. Constructed on the island of Pharos, in the harbor of Alexandria, it is said to have been more than 350 feet (107 m) high. . . . Within a century of its foundation, Alexandria had become the greatest city in the world, famed as a center of Greek scholarship and learning. Its celebrated library is alleged to have contained nearly half a million book-rolls, while a further 42,000 were housed in a second library attached to the temple of Serapis. Scholars, such as Archimedes, the philosopher Plotinus, and geographers Ptolemy and Eratosthenes, studied at the Mouseion, the great research institute founded by the Ptolemaic dynasty." [DK Timelines, p. 63]