what does a crown represent on a coat of arms
Crown (heraldry) A crown is often an emblem of the sovereign state, a monarch's government, or items endorsed by it; see The Crown. Crowns may also be used by some republics.
Coat of arms of Nigeria The coat of arms of Nigeria has a black shield with two white lines that form in a "Y" shape. The black shield represents Nigeria's fertile soil, while the two horses or chargers on each side represent dignity. The eagle represents strength, while the green and white bands on the top of the shield represent the rich soil.[1]