Ptolemy II Philadelphus ("The Sibling Loving", r. 282-246 BCE) was the second ruler of the Ptolemaic Dynasty. He consolidated the kingdom conquered by his father Ptolemy I and presided over its golden age. Ptolemy II invested heavily in Alexandria, overseeing the completion of the Library of Alexandria and the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.
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Timeline
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c. 285 BCEPtolemy II Philadelphus builds a large propylon gate at Samothrace.
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277 BCE - 276 BCE4,000 Celts are employed in Egypt under Ptolemy II.
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259 BCECelts in Egypt fail to overthrow Ptolemy II and are starved to death on an island.
