The Imperial Crown of Mexico was the crown created for the monarch of Mexico on two separate occasions. The crown of the First Mexican Empire, ruled by Agustin I of Mexico, can be seen in his many portraits, but its history is not entirely known.
The second Imperial Crown of Mexico, created during the Second Mexican Empire for Emperor Maximilian I (his consort was Charlotte of Belgium, or Empress Carlota of Mexico), who reigned from 1864–67, is better documented. The original crown was destroyed during the ensuing fighting and victory of the Mexican republic, but replicas remain on display.
The Imperial Crown of Mexico during Maximilian's reign was modeled on the crowns of France and Austria. The crown of Maximilian's ancestor, Maximilian I, Holy Roman Emperor, had two arches which cross over the top of the miter. It is this unique form which appears to have been the model—although, as Napoleon III was the main power behind the Second Mexican Empire, and as an extension of the Second French Empire, the Mexican crown also used the half-arches and eagles on the circlet on the front, back and sides from the Crown of Napoleon. The Imperial Crown of Mexico also shares many similarities with the Crown of Empress Eugenie, Napoleon III's consort.
Source: http://en.wikipedia.org/wiki/Imperial_Crown_of_Mexico
