An interesting attempt to recreate what the Corinthian helmets worn by Leonidas’ bodyguards, the brothers Alfeos [Alpheos] and Maron, may have looked like. Traditionally they are held by some to have been Olympic champions, and so in place of a horsehair crest, the helmet is decorated with a representation of an Olympic champion’s wreath of victory.
Roman mask helmet, 1st or 2nd century CE. These are often called 'parade' helmets for cavalry sports use, but it has been suggested that they were also used in combat. The psychological effect of being charged by one of these masked warriors would have been formidable.