Rooms and buildings follow a proportional approach based upon design disciplines formed in ancient times. Interior room
of almost any period have some form of entablature (ĕntăb´lechoor; Latin, and
tabula, a tablet) is : this is a classical architectural element, the superstructure
of mouldings and bands which lies horizontally above the columns, resting on their capitals. It is commonly
divided into the architrave, the supporting member carried from column to column, pier or wall, the part immediately
above the column; the freize, an unmolded strip that may or may not be ornamented; and the cornice, the projecting
and protective member.
The Doric version of the entablature is fairly simple. The architrave, the lowest band, is split, from bottom to top, into
the guttae, the regulae, and the taenia.
The frieze is dominated by the triglyphs, vertically channelled tablets, separated by metopes, which may
or may not be decorated. The triglyphs sit on top of the taenia, a flat, thin, horizontal protrusion, and are finished
at the bottom of by (often ornate) decoration of drops, called guttae, which belong to the top of the architrave.
The top of the triglyphs meet the protrusion of the cornice from the entablature. The underside of this protrusion is decorated
with mutules, tablets that are typically finished with guttae.
The cornice is split into the soffit, the corona, and the cymatium. The
soffit is simply exposed underside. The corona and the cymatium are the principal parts of the cornice.
The Ionic order of entablature adds the fascia in the architrave, which are flat horizontal protrusions,
and the dentils under the cornice, which are tooth-like rectangular block moldings.
The Corinthian order, however, adds a far more ornate frieze, divided, from bottom to top, into the cyma reversa,
the dentils, the ovulo, the modillions, the fascia, and the cymna
recta. The modillions are ornate brackets, similar in use to dentils, but often in the shape of acanthus
The frieze is sometimes omitted - for example, on the portico of the caryatides of the Erechtheum - and probably did not
exist as a structure in the temple of Diana at Ephesus. Neither is it found in the Lycian tombs, which are reproductions in
the rock of timber structures based on early lonian work. The entablature is essentially an evolution of the primitive lintel,
which spans two posts, supporting the ends of the roof rafters.
The structure of the entablature varies with the three classical orders, Doric, Ionic, and Corinthian.
In each, the proportions of the subdivisions (architrave, frieze, cornice) are defined by the proportions of the column in
the order. In Roman and Renaissance interpretations, it is usually around a fourth of the height of the column. Most versions
of entablature that do not fit these patterns are usually derived from them.
The entablature, going together with the system of classical columns, is rarely found outside of classical architecture.
However, it is sometimes used to complete the upper portion of a wall, where columns are not present, and in the case of pilasters
(pseudo-columns partially projecting from a wall) or detached or engaged columns it is sometimes profiled round them. This
use of the entablature irrespective of columns begins to appear after the Renaissance
In architecture the frieze is the wide central section part of an entablature and may be plain or — in the
Ionic or Corinthian order — decorated with bas-reliefs. In a columnar wall it lies upon the architrave
('main beam') and is capped by the moulding of the cornice.
In the interior of a room, the frieze of a room is the section of wall above the picture rail under the crown moldings
or cornice. By extension, a frieze is a long band of painted, sculpted or even written decoration in such a position, above
eye-level. These decorations often depict scenes, in an almost storyboard or animated sequence.
An example of an architectural frieze on the facade of a building is the octagonal Tower of Winds in the Roman agora
at Athens, which bears sculptures of the eight winds on its frieze.
A pulvinated frieze is convex in section. Such friezes were features of 16th-century Northern Mannerism,
especially in subsidiary friezes, and much employed in interior architecture and in furniture.
This concept has been generalized in the mathematical construction of freize pattermns.
In classical architecture the cornice is the set of projecting mouldings that crown an entablature. The cornice
lies above the frieze, which rests on the architrave. The function of the projecting cornice is to throw rainwater free of the building's walls.
In non-classical building practice, this function is handled by eaves and gutters, and in modern architecture
the elimination of the cornice has been important enough, often simply for demands of style, that elaborate internal drainage
systems are provided.
A pediment is formed under the gable end of a building, where the cornice is carried across the wall at the height
of the eaves and repeated above, under the roof line.
The cornice, by extension. becomes any horizontal molded projection which crowns an element: the cornice of a door or window,
for instance, or the cornice of a pedestal. A simple cornice may be formed just with a crown molding.
Each of the classic orders has certain characteristic profiles to its cornice:
- The cornice of the Doric order
- The cornice of the Ionic order
- The cornice of the Corinthian order
In Italianate architecture, a cornice roof line is featured in most variants of this style.
The term cornice comes from Italian cornice, meaning "ledge."
The architrave (also called epistyle) is the lintel or beam that rests on thecapitals of the columns. As such, it is the lowest part of the entablature consisting of architrave, frieze and cornice. The word is derived from the French and Italian words arch and trabs combined together to mean "main beam".
The architrave is different in the different orders. In the Tuscan, it only consists of a plain face, crowned with
a fillet, and is half a module in height. In the Doric and composite, it has two faces, or fasciae; and three in the Ionic
and composite, in which it is 10/12 of a module high, though but half a module in the rest. 
The word architrave is also used to refer to the mouldings (or other elements) framing a door, window or other
rectangular opening. See also archivolt.
the information on this page appears by courtesy of: http://en.wikipedia.org/wiki/Entablature the free on line encyclopaedia.