Great Helm

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The great helm or heaume, also called pot helm, bucket helm and barrel helm, is a helmet of the High Middle Ages which arose in the late twelfth century in the context of the Crusades and remained in use until the fourteenth century. The barreled style was used by knights in most European armies between about 1220 to 1350 AD and evolved into the frog-mouth helm to be primarily used during jousting contests.