The Boeotian helmet was a type of helmet that was used in Classical Antiquity and the Hellenistic period and originated in Boeotia. It was an open helmet, allowing good peripheral vision and unimpaired hearing, and was therefore used primarily by the cavalry. Hence its use was not as widespread as other ancient helmets such as the Corinthian or Phrygian types. It was modeled in the shape of a folded-down sun hat.