From the Greek arkhi- (“chief” or “principal”) and the Latin trabs (“beam”), an architrave is the lowest horizontal member of the classical entablature, resting directly upon the capitals of columns. In classical architecture, it functions structurally as the principal spanning beam while also serving as an important proportional and decorative element within the architectural order. The architrave forms the first division beneath the frieze and cornice in Greek and Roman architecture. The term is also used more broadly to describe molded trim or framing elements surrounding doors, windows, or openings.