Aspects of this topic are discussed in the following places at Britannica.
Gibraltar is considered one of the two Pillars of Heracles (Hercules), the other being Mount Hacho, on the African coast opposite. The Pillars, which according to Homer were created when Heracles broke the mountain that had connected Africa and Europe, defined the western limits of navigation for the ancient Mediterranean world. Since the 18th century Gibraltar has been a symbol of British...
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