Arch vs Swansea

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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

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Swansea (; Welsh: Abertawe [abɛrˈtawɛ]) is a coastal city and county, officially known as the City and County of Swansea (Welsh: Dinas a Sir Abertawe) in Wales. The county area includes Swansea Bay (Welsh: Bae Abertawe) and the Gower Peninsula. Swansea's position on the southwest coast of Wales is within the historic county boundaries of Glamorgan and the ancient Welsh commote of Gŵyr. Swansea is the second largest city in Wales and the twenty-fifth largest city in the United Kingdom.

Swansea had a population of 241,300 in 2014; the second most populous local authority area in Wales after Cardiff. Together with Neath and Port Talbot, Swansea formed a wider Urban Area of 300,352 in 2011. During the 19th-century industrial heyday, Swansea was the key centre of the copper-smelting industry, earning the nickname Copperopolis.

Source: Wikipedia