In classical, neoclassical and baroque architecture, a pediment is the triangular gable that forms the end of a pitched roof. It is placed above the horizontal entablature which is typically supported by columns. It is also sometimes seen as the top element of a portico. In classical Greek temples, the pediment was the crowning feature of the front elevation, with the tympanum (the area within the pediment) being decorated with relief sculptures depicting mythological figures and scenes.
There are a number of variations of the traditional pediment:
- The segmental or arch form in which the angular slopes of the cornice are replaced by a circle segment.
- The broken pediment in which the raking cornice is left open at the apex.
- The open pediment in Georgian architecture, in which the pediment is open along the base.
- The ‘swan-necked pediment’, where the raking cornice takes the form of two S-shaped brackets facing one another.
 Related articles on Designing Buildings Wiki
- Architectural styles.
- Barrel vault.
- Classical orders in architecture.
- Cornice coving and architrave definitions.
- Elements of classical columns.
- Flying buttress.
- Pendentive dome.
- Trompe l’oeil.
 External references
Featured articles and news
The IHBC is delighted to announce the judge for the 2016 IHBC Gus Astley Student Awards as David Trench CBE FCIOB, one of the UK's leading project managers, who is also a co-founder and chair of Designing Buildings Wiki (DBW), host platform for the IHBC’s Conservation Wiki.
Co-sponsor IHBC has welcomed the first conference of the Heritage Trust Network (HTN), successor to UKAPT, which took place in Birmingham’s Custard Factory on 13-14 October, and closed with the new organisation’s first AGM.
This week the Director’s top tender pick from the Bulletin features the Glasgow Building Preservation Trust (GBPT) scheme for the redevelopment of the West Boathouse on Glasgow Green, valued at £250,000.
A group of Londoners concerned at plans for almost 700 mostly luxury homes on the Royal Mail’s Mount Pleasant sorting office site in Clerkenwell, already granted permission, has requested approval for a rival design intended to provide 40 more affordable homes under a ‘community right to build’ application.
A fire has gutted the Grade II-listed, privately-owned mansion Cosgrove Hall, near Milton Keynes in Northamptonshire.
A survey by the British Property Federation (BPF) and GL Hearn has revealed that 65% of planning officers concerned that the system is getting worse, but also highlighted that the Northern Powerhouse decided 22% more major applications per resident than Greater London area.
English Heritage (EH) has launched a conservation appeal ‘Appeal to help support this vital work and safeguard our historic places for future generations’.
The Ulster Architectural Heritage Society (UAHS) has announced that a listed building currently at risk, Waterside Station, is to be the centre of a new transport hub in Derry-Londonderry.