Once upon time especially during Hellenistic period, Alexandria was the lighthouse of knowledge which embraced scientists from all around the world..to produce numerous of inventions to serve humanity..and now What!!🎓 A replica of the hydraulic clock of Ktesibios (3rd C. B.C.) #bibliothecaalexandrina ,#hydraulic ,#hydraulicclock ,#ktesibios ,#inventions ,#ancientalexandria ,#hellenistic ,#elenistique,#libraryofalexandria ,#alexandria_egypt ,#science ,#ancientworld (at Bibliotheca Alexandrina) https://www.instagram.com/p/BsYDQciBf8H/?utm_source=ig_tumblr_share&igshid=1020ystzc4rgi


















