In architecture, an impost or impost block is a projecting block resting on top of a column or embedded in a wall, serving as the base for the springer or lowest voussoir of an arch. The term impost capital is also used when appropriate.
In architecture, an impost or impost block is a projecting block resting on top of a column or embedded in a wall, serving as the base for the springer or lowest voussoir of an arch. The term impost capital is also used when appropriate.
Source: Wikipedia "Impost (architecture)" · CC BY-SA 4.0
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