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Much of what we know about the structure of the lighthouse comes from a [[German]] scholar named Hermann Thiersch, who authored a book on this topic, one of the best reference works on Pharos Lighthouse.  

Much of what we know about the structure of the lighthouse comes from a [[German]] scholar named Hermann Thiersch, who authored a book on this topic, one of the best reference works on Pharos Lighthouse.  

''It is generally reckoned that the Lighthouse was a tower over 100 metres tall standing on the eastern tip of Pharos island and that it was constructed in three stages: the first was square, the second octagonal and the last circular. Access to the entrance was up a long vaulted ramp. From there, a spiral staircase led up to the many chambers and it was perhaps used by beasts of burden to carry fuel to the third storey where the fire burned on the summit.'' <ref> [http://www.greece.org/alexandria/pharos/ The Lighthouse of Alexandria] </ref>

''It is generally reckoned that the Lighthouse was a tower over 100 metres tall standing on the eastern tip of Pharos island and that it was constructed in three stages: the first was square, the second octagonal and the last circular. Access to the entrance was up a long vaulted ramp. From there, a spiral staircase led up to the many chambers and it was perhaps used by beasts of burden to carry fuel to the third storey where the fire burned on the summit.'' <ref>[http://www.greece.org/alexandria/pharos/ The Lighthouse of Alexandria]</ref>

It gave its name "Pharos" to all the lighthouses in the world.  

It gave its name "Pharos" to all the lighthouses in the world.