Arch vs Sumy

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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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Sumy (Ukrainian: Суми [ˈsumɪ] (listen)) is a city in north-eastern Ukraine, and the capital of Sumy Oblast (region). Sumy also serves as the administrative center of Sumy Raion of Sumy oblast.

Sumy is administratively incorporated as a city of oblast significance and does not belong to the raion. The population estimate is 264,981 (2020 est.)

Source: Wikipedia