Fillet (clothing)

At that time, a fillet was a very narrow band of cloth, leather or some form of garland, frequently worn by athletes.

It was also worn as a sign of royalty and became symbolized in later ages as a metallic ring which was a stylized band of cloth.

Julius Caesar refused to wear a diadema when Mark Antony offered it to him, and the Roman emperors who came after generally followed this practice until Constantine I, the first to Christianize the Roman Empire, who adopted the Greek emblem of royalty.

[2] Later, in medieval times, a fillet was a type of headband worn by unmarried women, usually with a wimple or barbette.

[3] This is indicated in the sign language of some monks (who took oaths of silence), wherein a sweeping motion across the brow, in the shape of a fillet, indicated an unmarried woman.