Lighthouse of Alexandria

[hamo81]

Lighthouse of Alexandria

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The lighthouse of Alexandria (or The Pharos of Alexandria, Greek: ὁ Φάρος τῆς Ἀλεξανδρείας) 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 ~ 150 meters (377 ~ 492 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 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 a much taller height exceeding 180 meters that would make the tower the tallest building up to the 14th century

History

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 Chinese were familiar with the story of the lighthouse in Alexandria by at least the Song Dynasty (960–1279) period. In his book Zhu Fan Zhi, Zhao Rugua wrote in 1225 of a minaret lighthouse in Alexandria, Egypt, perhaps the ancient Lighthouse of Alexandria (Wade-Giles spelling):

The country of O-Ken-Tho (Alexandria) belongs to Egypt (Wu-Ssu-Li). According to tradition, in olden times a stranger (i jen), Chhu-Ko-Ni by name, built on the shore of the sea a great pagoda, underneath which the earth was excavated to make two rooms, well connected and thoroughly hidden. In one vault was stored grain, and in the other arms. The tower was 200 ft. high [Note: chang = 10 feet, chhih = 1 foot]. Four horses abreast could ascend (by a winding ramp) to two-thirds of its height. Below the tower, in the middle, there was a well of great size connected by a tunnel with the great river. To protect this pagoda from foreign soldiers, the whole country guarded it against all enemies. In the upper and lower parts of it twenty thousand men could readily be stationed as a guard or to make sorties. At the summit there was an immense mirror. There was an old story said that if warships of other countries tried to make an attack, the mirror detected them beforehand, and the troops were ready to repel it. But in recent years there came (to Alexandria) a foreigner, who asked to be given work in the guardhouse below the tower, and he was employed to sprinkle and to sweep. For years no one entertained any suspicion of him, but suddenly one day he found an opportunity to steal the mirror and throw it into the sea, after which he made off.[1]

Construction and destruction

In the 3rd century BC, after having been initiated by Satrap (governor) Ptolemy I Soter, Egypt's first Hellenistic ruler and a general of Alexander the Great. After Alexander died unexpectedly at age 33, Ptolemy Soter (Saviour, named so by the inhabitants of Rhodes) made himself king in 305 BC 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 sea-faring [ones]). These words were hidden under a layer of plaster, on top of which was chiselled another inscription honouring Ptolemy the king as builder of the Pharos. After centuries the plaster wore away, revealing the name of Sostratus

There are ancient claims the light from the lighthouse could be seen from up to 35 miles (56 km) away. Unconfirmed legends claim the light from Pharos could burn enemy ships before they reached shore.

Constructed from large blocks of light-coloured stone, the tower was made up of three stages: a lower square section with a central core, a middle octagonal section, and, at the top, a circular section. At its apex was positioned a mirror which reflected sunlight during the day; a fire was lit at night. Extant Roman coins struck by the Alexandrian mint show that a statue of a triton was positioned on each of the building's four corners. A statue of Poseidon stood atop the tower during the Roman period.
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 tower was severely damaged by two earthquakes in 1303 and 1323, to the extent that the Arab traveller Ibn Battuta reported not 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.

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[hamo81]

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