Lomé vs Arch

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Lomé is the capital and largest city of Togo. It has an urban population of 837,437 while there were 1,477,660 permanent residents in its metropolitan area as of the 2010 census. Located on the Gulf of Guinea, Lomé is the country's administrative and industrial center, which includes an oil refinery, and its chief port, where it exports coffee, cocoa, copra, and oil palm kernels.

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