cervelliere

thumb|right|Early cervelliere (11–12th century) thumb|Late cervelliere (14th century), also included as early form of bascinet

A cervelliere (cervelière, cervelliera; , , , ) is a hemispherical, close-fitting skull cap of steel or iron. It was worn as a helmet during the medieval period and a version known as a secret was worn under felt hats during the Wars of the Three Kingdoms in the early modern period.