The Lighthouse of Genoa (Lanterna di Genova) serves as a symbol and a landmark for Genoa. Built of masonry, at 76 m it is the world's fifth tallest lighthouse and the second tallest 'traditional' one. Between 1543 and the construction of the lighthouse on Île Vierge, France in 1902, it was the tallest lighthouse in the world. When measured as a whole with the natural rock on which it stands, as it is commonly perceived and represented, its height is 117 m, which would make it the second tallest lighthouse in the world, the tallest in Europe, and the tallest traditional lighthouse.
It is constructed in two square portions, each one capped by a terrace; the whole structure is crowned by a lantern from which the light is shone.
The tower was shelled during the bombardment of Genoa by the French in 1684; the windows which were damaged were replaced on the orders of Louis XIV in 1692. In 1778 construction began on a new lighting system designed to counteract damage done to the lighting apparatus over several centuries of use. In 1840 a rotating Fresnel lens was installed; the system was formally inaugurated in January 1841. It was modified up until the end of the century in order to increase its capability; the entire lighthouse was modernised again in 1913, but the electrification was poorly done, and had to be refitted in 1936. One last major restoration project, begun after American and British air attacks of World War II, was completed in 1956. It is also the symbol surrounding the Derby della Lanterna between two football clubs, Genoa C.F.C. and U.C. Sampdoria.
Adjacent to the tower is the Museo della Lanterna. The museum mainly covers the history of the city and the port, and contains a good deal of archival material. Some of the displays also cover the history of navigation and navigational aids in Genoa, and describe various signaling systems that have been used at sea. Part of a Fresnel lens, similar to that found in the lighthouse itself, is shown in such a manner as to display its inner workings. In addition to the permanent displays, temporary exhibits are also sometimes shown at the museum.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.