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Fort San Cristóbal (Spain) : ウィキペディア英語版 | Fort San Cristóbal (Spain)
The Fort Alfonso XII or San Cristóbal is a fort located on the top of the mount San Cristóbal or Ezcaba (892,8 m above sea level), 4 km from Pamplona, Spain. ==Construction after the 3rd Carlist War== It was built after the Carlist War of 1872-1876 because Carlists succeeded to reach Pamplona -controlled by the liberal Government- with their artillery from this and other mountains surrounding Pamplona from the north. The advances in artillery during late 19th century forced the military authorities to build this kind of fortifications in order to control mountains and hills close to important towns. Another example of this is the fort San Marcos, near to San Sebastián. It was built from 1878 to 1919. The top of the mountain was blasted and most of the construction is underground, so it is barely visible from the outside. Its three floors have an extension of 180,000 m². It is surrounded by a moat and the total extension of the facility is 615,000 m².
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