The Late Roman ridge helmet was a type of combat helmet of late antiquity used by soldiers of the late Roman army. It was characterized by the possession of a bowl made up of two or four parts, united by a longitudinal ridge.
The Deurne Helmet from the 4th century is an elaborate reconstruction of a late Roman cavalry helmet found near Deurne, Holland. The intricate ornamentation of the Deurne Helmet suggests that the wearer was a very high-ranking officer. A Roman coin found near the helmet bears the date 319, so the helmet is very likely from the early 4th century.