The Garrison Border Town of Elvas and its Fortifications, a UNESCO World Heritage site in Portugal, is a remarkably preserved example of a fortified frontier town. Extensively developed between the 17th and 19th centuries, it features the world’s largest bulwarked dry-ditch system, including star-shaped walls, outlying forts, and the impressive Amoreira Aqueduct, designed to sustain long sieges. Its military architecture, influenced by Dutch, Italian, and French theories, reflects Portugal’s strategic defen...
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