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The Lighthouse of Alexandria took 12 years to build. Archaeologists will never Know exactly how long it took, as many different sources all say different things.
about 2,350 people built the lighthouse of alexandria
There were two earthquakes that had a direct impact on the Lighthouse of Alexandria.
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It is believed that, not only was the lighthouse at Alexandria the tallest lighthouse in the world for its time, but no lighthouse constructed since then has equalled it in height. It employed remarkable technology for the time, and stood for many centruies before being destroyed by a series of earthquakes.
great pyramid lighthouse of Alexandria
The range was 29 miles or 47 Kms
Yes, she had many slaves. Some were personal slaves, others were the palace staff and yet others were the public slaves in the city of Alexandria.
Since the 13th century? None. That's when it was destroyed in an earthquake.
The first lighthouse of Egypt was the Pharos, of Alexandria. The height of the lighthouse of Alexandria was estimated to have been between 115 and 135 m, or 380 and 440 ft, as 10th century travellers reported it as being 300 cubits high. To give a comparison, a 40 storey modern building is about 134m in height.
Alexandria was an important trade centre, and a clearly visible lighthouse was necessary for the many ships entering the harbour. Also, it was a very wealthy city, and what better way to show off the wealth of a city than to construct a magnificent tower like the Pharos?
Slaves were not used to build pyramids, they used a paid workforce.