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.
Corinthian helmet from the tomb of Denda. From a Greek workshop in South Italy, 500–490 BC. Wikipedia: The Corinthian helmet originated in ancient Greece and took its name from the city-state of Corinth. It was a helmet made of bronze which in its later styles covered the entire head and neck, with slits for the eyes and mouth. A large curved projection protected the nape of the neck. It also protected the cheek bones, which Greeks adored.