John has an unbelievable post on ancient Greek technology. It got me started on my own little journey. The link I read of the many he posted was The Antikythera Mechanism: Physical and Intellectual Salvage from the 1st Century B.C.. It had some really cool assessments of Rhodian technology. Rhodes is part of the Dodecanese Archipelago ('Dodeka' is Greek for twenty, thus 'The Archipelago of Twenty Islands'). You know Rhodes had the Colossus ((+1 with misleading picture at top.).
It makes me think of Archimedes in Syracuse on the SE corner of Sicily. There's pretty good evidence that, among many other amazing things, he used mirrors to light the sails of attacking ships on fire.
That makes me think of the Lighthouse of Alexandria.