CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Roman arch construction. Computer artwork showing the design of an Ancient Roman architectural arch. The arrangement of the stones means the forces (red arrow) are passed along them and carried to the ground by the lowest brick on each side. 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.
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