Architrave
In classical architecture, an architrave (; from "chief beam", also called an epistyle; from Greek ἐπίστυλον "epistylon" "door frame") is the lintel or beam that rests on the capitals of columns. The term can also apply to all sides, including the vertical members, of a frame with mouldings around a door or window. The word "architrave" has come to be used to refer more generally to a style of mouldings (or other elements) framing a door, window or other rectangular opening, where the horizontal "head" casing extends across the tops of the vertical side casings where the elements join (forming  a butt joint, as opposed to a miter joint). Classical architecture. In an entablature in classical architecture, it is the lowest part, below the frieze and cornice. The word is derived from the Greek and Latin words "arche" and "trabs" combined to mean "main beam". The architrave is different in the different Classical orders. In the Tuscan order, it only consists of a plain face, crowned with a fillet, and is half a module in height. In the Doric and Composite order, it has two faces, or fasciae, and three in the Ionic and Corinthian order, in which it is  10/12 of a module high, though but half a module in the rest. Metaphorical use. The term "architrave" has also been used in academic writing to mean the fundamental part of something (a speech, a thought or a reasoning), or the basis upon which an idea, reasoning, thought or philosophy is built. Examples: Indian architecture. In śilpaśāstra, the Hindu texts on architecture, the architrave is commonly referred to by its Sanskrit name "uttara". In Hindu temple architecture it is placed above the bracket ("potika") of a pillar ("stambha"), which gives it extra support. The Indian entablature is called "prastara". Dravidian  architecture recognizes several distinct types of architraves: