As Maximilian and Carlota had no children, they adopted Agustín de Iturbide y Green and his cousin Salvador de Iturbide y de Marzán, both grandsons of Agustín de Iturbide, who had briefly reigned as Emperor of Mexico in the 1820s. Iturbide and his cousin were granted the title Prince de Iturbide and the style of Highness by an imperial decree of 16 September 1865, and were ranked next in line after the reigning family. Apparently, the royal couple intended to groom Agustín as heir to the throne. Maximilian never really intended to give the crown to the Iturbides because he believed that they were not of royal blood. It was all a charade directed at his brother Archduke Karl Ludwig of Austria, as Maximilian explained himself: either Karl would give him one of his sons as an heir, or else he would bequeath everything to the Iturbide children.