In heraldry, the chapeau, often called a cap of maintenance, symbolizes high honour, noble status, ceremonial dignity, and sovereign favour, and it is one of the most distinguished accessories in a full heraldic achievement. Traditionally shown as a red cap turned up with ermine, the chapeau was used in royal and noble ceremony and became an important sign of privilege granted or recognized at the highest level. In heraldry, it often appears beneath a crest rather than as a charge on the shield itself, especially in the achievements of peers, certain chiefs, and corporate bodies with historic rights or ceremonial standing.

Its presence signals rank and honour more than family virtue in a moral sense, though it also conveys the prestige and continuity of inherited status. The chapeau is especially notable in British heraldry, where it formed part of the visual language of aristocratic display and public distinction. In heraldic design, it stands as a richly symbolic emblem of dignity and favour, expressing the idea that honour is not only won in action, but also formally acknowledged and displayed through tradition.