Crowns

In Classical antiquity the crown (corona) that was sometimes awarded to people other than rulers, such as triumphal military generals or athletes, was actually a wreath or chaplet, or ribbonlike diadem.
History
The precursor to the crown was the browband called the diadem, which had been worn by the Achaemenid Persian emperors, was adopted by Constantine I, and was worn by all subsequent rulers of the later Roman Empire.