For 10 points, name this title held by Agustin Iturbide from 1822-1823 and Maximillian von Habsburg from 1864-1867, which involves reigning over America's southern neighbor.
One man to hold this title worked with Commodore Matthew Maury to create the New Virginia Colony. Another man who held this title led the "Army of the Three Guarantees" after signing an agreement with his rival, Vicente Guerrero. One holder of this title was captured at Queretaro and executed at the Hill of the Bells after being defeated by General Porfirio Diaz and President Benito Juarez. That man was the husband of Carlotta. For 10 points, name this title held by Agustin Iturbide from 1822-1823 and Maximillian von Habsburg from 1864-1867, which involves reigning over America's southern neighbor.
One man to hold this title worked with Commodore Matthew Maury to create the New Virginia Colony.
{Emperor} of {Mexico}