The Lighthouse of Alexandria

The Lighthouse of Alexandria (or The Pharos of Alexandria) was a tower built in the 3rd century BC (between 285 and 247 BC) on the island of Pharos in Alexandria, Egypt to serve as that port's landmark, and later, its lighthouse.

With a height variously estimated at between 115 and 150 m (380 and 490 ft) it was among the tallest man-made structures on Earth for many centuries, and was identified as one of the Seven Wonders of the Ancient World by Antipater of Sidon. It may have been the third tallest building after the two Great Pyramids (of Khufu and Khafra) for its entire life. Some scholars estimate that would make the tower the tallest building up to the 14th century. Due to the centuries of earthquakes,tornadoes,and hurricanes, it's now under water.

Pharos was a small island just off the coast of Alexandria. It was linked to the mainland by a man-made connection named the Heptastadion, which thus formed one side of the city's harbor. As the Egyptian coast is very flat and lacking in the kind of landmark used at the time for navigation, a marker of some sort at the mouth of the harbour was deemed necessary - a function the Pharos was initially designed to serve. Use of the building as a lighthouse, with a fire and reflective mirrors at the top, is thought to date to around the 1st century AD, during the Roman period. Prior to that time the Pharos served solely as a landmark or day beacon.

The lighthouse was completed in the 3rd century B.C., after having been initiated by Satrap (governor) Ptolemy I Soter, Egypt's first Macedonian ruler and a general of Alexander the Great. After Alexander died unexpectedly at age 32, Ptolemy Soter (Saviour, named so by the inhabitants of Rhodes) made himself king in 305 B.C. and ordered the construction of the Pharos shortly thereafter. The building was finished during the reign of his son, Ptolemy Philadelphos.

According to legend, Sostratus was forbidden by Ptolemy from putting his name on his work. But the architect left the following inscription on the base's walls nonetheless: "Sostratus, the son of Dexiphanes, the Cnidian, dedicated (or erected) this to the Saviour gods, on behalf of those who sail the seas"; the original Greek inscription "ΣΟΣΤΡΑΤΟΣ ΔΕΞΙΦΑΝΟΥ ΚΝΙΔΙΟΣ ΘΕΟΙΣ ΣΩΤΕΡΣΙΝ ΥΠΕΡ ΤΩΝ ΠΛΩΙΖΟΜΕΝΩΝ" literally means: "Sostratos of Dexiphanes [meaning: son of Dexiphanes] the Cnidian to Saviour Gods for the seafarers (or seafaring [ones])". These words were hidden under a layer of plaster, on top of which was chiseled another inscription honoring Ptolemy the king as builder of the Pharos. After centuries the plaster wore away, revealing the name of Sostratus.

The Pharos' walls were strengthened in order to withstand the pounding of the waves through the use of molten lead to hold its masonry together, and possibly as a result the building survived the longest of the Seven Wonders - with the sole exception of the Great Pyramid of Giza. It was still standing when the Muslim traveller Ibn Jubayr visited the city in 1183. He said of it that: "Description of it falls short, the eyes fail to comprehend it, and words are inadequate, so vast is the spectacle." It appears that in his time, there was a church located on the top.

The two earthquakes in 1303 and 1323, damaged the lighthouse to the extent that the Arab traveler Ibn Battuta reported no longer being able to enter the ruin. Even the stubby remnant disappeared in 1480, when the then-Sultan of Egypt, Qaitbay, built a medieval fort on the former location of the building, using some of the fallen stone. The remnants of the Pharos that were incorporated into the walls of Fort Qaitbey are clearly visible due to their excessive size in comparison to surrounding masonry.

The fate of the Lighthouse of Alexandria from the Arab conquest until its collapse in the 14th century has been investigated by Doris Behrens-Abouseif in her article "The Islamic History of the Lighthouse of Alexandria".

... wikipedia