Diadem

For other uses, see Diadem (disambiguation).
Coin of Antiochus III the Great of the Seleucid Empire, shown wearing a diadem; the Greek inscription reads ΒΑΣΙΛΕΩΣ ΑΝΤΙΟΧΟΥ, of King Antiochus.
Gold diadem. India, 9th–10th century
Diadem given to Veiled Prophet Queen of Love and Beauty, Veiled Prophet Ball, St. Louis, Missouri, in 1920

A diadem is a type of crown, specifically an ornamental headband worn by monarchs and others as a badge of royalty.