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Gibraltar[jibrOl´tur] Pronunciation Key, British crown colony (1995 est. pop. 32,000), 2.5 sq mi (6.5 sq km), on a narrow, rocky peninsula extending into the Mediterranean Sea from SW Spain. Most of the peninsula is occupied by the Rock of Gibraltar (Lat. Calpe), one of the Pillars of Hercules, which guards the northeastern end of the Strait of Gibraltar, linking the Mediterranean with the Atlantic. The town of Gibraltar lies at the northwest end of the Rock of Gibraltar. The peninsula is connected with the mainland by a low sandy area of neutral ground. West of the peninsula is the Bay of Gibraltar, an inlet of the strait. There is a safe enclosed harbor of 440 acres (178 hectares). The rock, of Jurassic limestone, contains caves in which valuable archaeological finds have been made. It is honeycombed by defense works and arsenals, which are largely concealed. A tunnel bisects the rock from east to west.
The town is a free port, with some transit trade; financial services and duty-free shopping are economically important. The climate is mild and pleasant, and tourism has become an important industry. During the many years that Gibraltar was a British fortress, most of the area was taken up by military installations, and the civilian population was kept small. Many of the laborers lived in the Spanish border town of La LInea. The population is mostly of English, Spanish, Italian, Portuguese, or Maltese descent. Nearly three quarters of the population is Roman Catholic, and there are Protestant, Muslim, and Jewish minorities. English is the official language.
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