Projecting masonry platform into the sea, so as to stop the movement of sands and gravel blocking a navigable channel. Sometimes with a lighthouse on.
A column of stone used to support an arch at the end of an arcade. These may be elaborately carved or painted, or be made of many individual columns to make a large so-called compound pier. Examples of such incised piers are at Lindsifarne, Northumberland, and Durham Cathedral.
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