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A decorative molding that crowns a building or furniture element.

The central, topmost stone of an arch that holds the other stones in place.

The triangular space between the curve of an arch and the rectangle surrounding it.

A vertical pillar, typically cylindrical and made of stone or concrete, that supports an entablature or arch.

A wedge-shaped stone that forms the curved part of an arch.

A free-standing buttress attached to the main structure at one end, and often found in Gothic architecture.

A projecting support built against an external wall to brace the wall and counteract lateral (sideways) forces.

The topmost member of a column or pillar, often decorative, which transitions from the shaft to the lintel.

The triangular upper part of the front of a classical style building, often seen above the entrance.

The elongated, vertical part of a column between the base and the capital.

The wide central section part of an entablature, often decorated with carvings or paintings.

The horizontal part in classical architecture that rests on the columns and consists of the architrave, frieze, and cornice.

The uppermost section of moldings along the top of the entablature in classical architecture.

The lowest part of an entablature, resting directly on top of the columns.

A rounded vault forming the roof of a building or structure, typically with a circular base.

A rectangular column projecting only slightly from a wall and in classical architecture follows the form of one of the orders.

A vertical bar between the panes of glass in a window.

The face or front of a building, especially an imposing or decorative one.

A horizontal support of stone, wood, or metal across the top of a door or window.

The triangular upper part of a wall at the end of a ridged roof.

A small tower on top of a larger tower or at the corner of a building, projecting vertically from the building.

A low protective wall along the edge of a roof, bridge, or balcony.

A series of arches supported by columns or piers, either freestanding or attached to a wall as a decorative feature.

A large hall or building with double colonnades and a semicircular apse, used in ancient Rome as a court of law or for public assemblies.

A rectangular column, especially one projecting from a wall.

The stonework elements that support the glass in a Gothic window.

The upper part of a wall containing windows above eye level to admit light.

An arched form used to provide a space with a ceiling or roof.

In ancient Mesopotamian architecture, a tiered pyramidal structure that bears a temple at its summit.

A railing at the side of a staircase or balcony to prevent people from falling.

A porch leading to the entrance of a building, or extended as a colonnade, with a roof structure over a walkway, supported by columns or enclosed by walls.

The design and placement of windows in a building.

A semicircular or polygonal terminator to the choir, chancel, or aisle of a church.

A typically symmetrical two-sided roof with two slopes on each side, the lower slope being steeper than the higher.

The space enclosed by a lintel and an arch over a doorway.

The external angle of a wall or the stones that form that angle, often in a contrasting color or texture.

An open-roofed porch extending along the outside of a building, often partially enclosed by a railing.

The central part of a church building, intended to accommodate most of the congregation.

A four-sided gambrel-style hip roof characterized by two slopes on each of its sides with the lower slope, punctured by dormer windows, at a steeper angle than the upper.

An intermediate level or levels between the floor and ceiling of any story.

The base or platform upon which a column, pedestal, statue, or structure rests.

A long projecting beam or girder fixed at only one end, used in bridge construction.

A spiral, scroll-like ornament that forms the basis of the Ionic order, found in the capital of the Ionic column.

A gallery or room with one or more open sides, usually covered, often on an upper floor and extending along the outside of a building.

A large open space, often several stories high and having a glazed roof and/or large windows, typically found in the entrance of a building.

A small, often dome-like structure on top of a building; used to provide light and air.

A horizontal crossbar in a window, over a door, or between a door and a window or fanlight above it.

A curved triangle of vaulting formed by the intersection of a dome with its supporting arches.

A projection jutting out from a wall to support a structure above it, such as a balcony or arch.

A window that projects vertically from a sloping roof.

An arch that consists of two or more arches of reduced spans superimposed within a larger arch.

The upper part of a wall that rises above the adjoining roof, which has windows that admit light.

A distinctive ornament at the apex of a roof, pinnacle, canopy, or similar structure in a building.