Portcullis — Middle Ages

The story behind the answer

This is the heavy, vertically sliding lattice gate—usually iron or oak—whose spiked bottom edge and side grooves reveal its purpose: it could be dropped in seconds to seal the entrance. Winches and chains in the gatehouse raised it, while the grid allowed defenders to see and shoot at attackers who pressed against it.

In many castles it worked in pairs, trapping enemies in a short passage while arrows, boiling liquids, or stones rained down through murder holes. Combined with a drawbridge and thick doors, it formed a layered defense typical of the High and Late Middle Ages. Fittingly, its name derives from Old French for “sliding door,” a reminder that speed and control mattered as much as brute strength in medieval fortification.