Évora vs Arch

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Évora (US: EV-uurr-ə, Portuguese: [ˈɛvuɾɐ] (listen); Proto-Celtic: *Ebora) is a city and a municipality in Portugal. The population in 2011 was 56,596, in an area of 1307.08 km². It is the seat of the Évora District. The present Mayor is Carlos Pinto de Sá of the CDU coalition. The municipal holiday is 29 June. Due to its well-preserved old town centre, still partially enclosed by medieval walls, and many monuments dating from various historical periods, including a Roman Temple, Évora is a UNESCO World Heritage site. It is also a member of the Most Ancient European Towns Network.

Évora being inland leads it to being one of Portugal's hottest cities prone to strong heat waves. Even so, it is milder than areas farther inland across the Spanish border. Évora is ranked number two in the Portuguese most livable cities survey of living conditions published yearly by Expresso. It was ranked first in a study concerning competitiveness of the 18 Portuguese district capitals, according to a 2006 study made by University of Minho economic researchers.

Source: Wikipedia

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An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it. Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof.

Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.

Source: Wikipedia