+An **arch** is a curved structural form spanning an opening, designed to bear [Weight](/wiki/Weight) above it. It skillfully redirects vertical forces outward to its supports, a fundamental principle in [Architecture](/wiki/Architecture) that allows for grand, open spaces.
+## See also
+- [Vault](/wiki/Vault)
+- [Bridge](/wiki/Bridge)
+- [Keystone](/wiki/Keystone)