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The following book is recommended Huber, M. Traugott. Pharaoh Alexander the Great – his Tomb, his Sarcophagus, and his Mummy. Norderstedt, Feb. 2019. ISBN 9783748140658. 288 pp. EUR 49. - Alexander had four not three Tombs. His original Tomb is identified and illustrated for the first time. - Alexan...

Pella was the town of Cassander and massively enlarged during his reign. The Lion hunt mosaic may date to ca 305 BC. Any relation to Alexander or Hephaistion is purely fictitious. The initial question lacks alternative 3: i.e. none.

Best regards.
Aigyptos