Ptolemy II Philadelphus

Ptolemy II greatly expanded the Library of Alexandria, acquiring manuscripts from across the known world. He appointed scholars like Zenodotus and Callimachus as librarians, making Alexandria the preeminent center of Hellenistic learning and scholarship.

Ptolemy II completed the construction of the Pharos Lighthouse on the island of Pharos off Alexandria. The lighthouse, one of the Seven Wonders of the Ancient World, stood over 100 meters tall and guided ships into the harbor, becoming a symbol of Ptolemaic power and engineering.

Ptolemy II fought the First Syrian War against the Seleucid king Antiochus I. He successfully defended Ptolemaic possessions in Coele-Syria and expanded Egyptian influence into the Aegean and Anatolia, securing his kingdom's position as a major Hellenistic power.

Ptolemy II married his full sister Arsinoe II, a practice common in Egyptian pharaonic tradition but unusual for Greeks. This marriage consolidated his power and was used for propaganda, with both being deified as the Theoi Philadelphoi (Sibling-Loving Gods).

According to tradition, Ptolemy II commissioned the translation of the Hebrew Bible into Greek, known as the Septuagint, for the Library of Alexandria. This translation made Jewish scriptures accessible to the Greek-speaking world and became foundational for Christianity.