Arch

an architectural term found only in Ezek. 40:16, 21, 22, 26, 29.
There is no absolute proof that the Israelites employed arches
in their buildings. The arch was employed in the building of the
pyramids of Egypt. The oldest existing arch is at Thebes, and
bears the date B.C. 1350. There are also still found the remains
of an arch, known as Robinson's Arch, of the bridge connecting
Zion and Moriah. (See TYROPOEON VALLEY T0003738.)