PETASUS
A flat felt hat, with a broad and round brim, usually worn among the Thessalians. The brim is often parted into four bow-shaped indentations (fig. 2). It is said to have been introduced into Greece along with the chlamys as a distinguishing mark of the ephebi. Hermes is usually represented with the winged petasus. The Romans wore a similar hat in the country, and when travelling; in the city it was generally used only in the theatre, as a protection from the sun.
Pictures and Media
Gerhard, Arch. Zeitung. 1844, tav. xiv
Muller, Denkm. i. no. 327.