Architectural Terms

  • Abacus : Flat top of the capital of a column.

  • Apse : Semicircular termination or recess at the end of a church.

  • Architrave : In classical architecture, the beam which extends across the top of the columns; it forms the lowest part of the entablature.

  • Baldachin : Decorated canopy, usually over an altar.

  • Baptistry : Building used for the baptismal rite and containing the font. Sometimes merely a bay or chapel reserved for baptisms.

  • Bay : Compartment or unit of division of an interior or of a facade - usually between one window or pillar and the next.

  • Belvedere : Open sided structure designed to offer extensive views, normally in a formal garden.

  • Boss : Projection, usually carved, at the intersection of stone ribs of Gothic vaults and ceilings.

  • Broach spire : Octagonal spire rising from a square tower without a parapet, with pyramidal forms at the angles.

  • Buttress : Vertical mass of masonry built against a wall to strengthen it and to resist the outward pressure of a vault.

  • Campanile : Detached bell-tower, most commonly found in Italy.

  • Capital : Crowning feature of a column, usually carved.

  • Caryatid : Sculptured female figure serving as a supporting column.

  • Cornice : Projecting upper part of the entablature in classical architecture.

  • Dado : Lower part of an interior wall when panelled or painted separately from the main part.

  • Dome : Rounded, usually hemispherical, vault forming a roof.

  • Drum : Vertical, cylindrical lower part of a dome or cupola.

  • Entablature : In classical architecture, the beam-like division above the columns, comprising architrave, frieze and cornice.

  • Fleche : Slender wooden spire rising from a roof. The word is French for 'arrow'.

  • Flying buttress : Arch conveying the thrust of a vault towards an isolated buttress.

  • Folly : Purely decorative building, without function, such as the Gothic ruins built to romanticise parks and gardens in 18th century England.

  • Frieze : Decorated central division of an entablature, between the architrave and the cornice.

  • Keystone : Central, wedge-shaped stone of an arch, so called because the arch cannot stand up until it is in position.

  • Lancet window : Window with a single, sharply pointed arch. The style is associated with the Early English period of Gothic architecture, around the 13th century.

  • Mezzanine : Low storey introduced between two loftier ones, usually the ground and first floors.

  • Order : Basic element of classical and Renaissance architecture, comprising the base, column, capital and entablature.

  • Oriel : Bay window on an upper floor, supported by projecting stonework.

  • Pediment : In classical architecture, the low-pitched gable above the entablature, usually filled with sculpture.

  • Pier : Vertical masonry support for a wall arch.

  • Piloti : Column on an unenclosed ground floor carrying a raised building above.

  • Podium : Continuous base under a building.

  • Rustication : Heavy stonework with a surface left rough, or with deeply channelled joints, used principally on Renaissance buildings.

  • Spandrel : Triangular space between the curves of two adjacent arches and the horizontal moulding above them.

  • Tracery : Ornamental stonework in the upper part of a Gothic window.

  • Tympanum : Triangular surface bounded by the mouldings of a pediment; also the space, often carved, between the lintel and arch of a Gothic doorway.

  • Vault : A roof or ceiling built in stone, brick or concrete, as opposed to wood.

  • Volute : Spiral scroll at each corner of an Ionic or Corinthian capital.
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