Portcullis
A portcullis is a strong grate - commonly made of wood, iron or both - that is typically incorporated into the walls of a castle or other type of fortification. These devices were often used in the middle ages
The word portcullis comes from the French, porte coleice or "sliding gate".A portcullis is situated within vertical grooves that are inset within the jambs of a doorway so the heavy structure can move up and down.
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