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Pier (architecture)

Upright support in arches or bridges / From Wikipedia, the free encyclopedia

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A pier, in architecture, is an upright support for a structure or superstructure such as an arch or bridge. Sections of structural walls between openings (bays) can function as piers. External or free-standing walls may have piers at the ends or on corners.

The Pont du Gard (c.19 BC), Nîmes; 3 rows of piers with arches springing from them to support the bridge.