For 10 points, name this Austrian who, at the urging of Napoleon III, became king of Mexico.
Vichy defense minister Maxime Weygand may have been the illegitimate child of this man's widow. He had originally been slated to marry Maria Amalia of Braganza, but she died before they could be united. After an assassination attempt on his brother, this man rallied for the construction of the Votive Church in his homeland. He disastrously implemented the Black Decree, calling for the execution of enemy prisoners. This man was shown (*) fraudulent voting statistics that said his reign was popular. The husband of Carlota of Belgium, he was executed after he was captured in the province of Queretaro by Benito Juarez. For 10 points, name this Austrian who, at the urging of Napoleon III, became king of Mexico.
Vichy defense minister Maxime Weygand may have been the illegitimate child of this man's widow.
Maximilian I of Mexico [or Carlota before "man" is read"]