Kyrbasia

The kyrbasia was a type of headgear worn by the satraps of the Achaemenid Empire. It was later adopted by several post-Achaemenid dynasties, including the early Arsacids of Parthia, the early Ariarathids of Cappadocia, the Orontids of Sophene, and the Frataraka of Persis.
The kyrbasia is sometimes erroneously referred to as a bashlyk, the Turkic word for a similar headgear used by Cumans, Kipchaks and Tatars during the Middle Ages.
The kyrbasia may be identical with the headgear called kidaris in ancient sources.