Note:  Do not rely on this information. It is very old.

Maintenance Capof

Maintenance, Cap of, in heraldry, a cap of dignity, originally borne before English sovereigns at their coronation, used in blazonry as the supporter of the crest (at first of noble personages only) in place of a crown, coronet, or wreath. The name is also given to a cap borne on state occasions before the mayors of certain cities.