La Giralda is a former minaret that was converted to a bell tower for the Cathedral of Seville in Seville. The tower is 104.5 m in height and it was one of the most important symbols in the medieval city.
The tower was begun under the architect Ahmad Ben Baso in 1184. After Ben Baso's death, other architects continued work on the tower. The mathematician and astronomer Jabir ibn Aflah (or Geber) is also often credited with the tower's design. The tower was completed March 10, 1198 with the installation of copper spheres on the tower's top. Architects designed similar towers in what are now Spain and Morocco during this period. The tower of the Koutoubia Mosque in Marrakesh served as a model for the Giralda and its sister, the Hassan Tower in Rabat.
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Numerous replicas of the Giralda have been built in the United States: one, now destroyed, in the second Madison Square Garden in New York City, designed by Stanford White, and another in Kansas City. The clock tower of the Ferry Building in San Francisco is also based on the Giralda. (wikipedia)
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