It is a triple opening. The central part is arched, while the two lateral sections have a straight upper frame. The term is derived from the name of an architect from Bologna, Sebastiano Serlio (1475-1555), who proposed the design in his manual of architecture, but it was already known in Roman times.

It is a form of cross vaulting in which the weight of the segments is evenly distributed over raised stone ribs.

It is an element which crowns a façade, dome etc. Often used in Gothic architecture sometimes as a purely decorative feature on doorways.

It is a convex moulding in the shape of a quarter circle which forms a horizontal band: usually a decorative member in a Corinthian or Doric cornice.

It is a technique consisting of the inlay of ornamental woods, metals, ivory and other decorative materials, arranged to form designs and patterns.

It is a semi-circular space decorated with frescoes or mosaics usually situated above doors or windows where the vault joins the walls. Also used to describe a semicircular section above a painting or bas-relief.

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