More on Civic Crown from Infoplease:

• Civic Crown - Civic Crown (See under Crown.) Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894 ...
• Crown - Crown In heraldry nine crowns are recognised: The oriental, the triumphal or imperial, the diadem, ...
• Dictionary of Phrase and Fable: C - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "C"