Bucephalus later versions of the Alexander Romance also synchronized the hour of their death. The pair forged a sort of cult in that, after them, it was all but expected of a conqueror that he have a favourite horse. Julius Caesar had one; so too did the eccentric Roman Emperor Caligula, who made a great fuss of his horse Incitatus, holding birthday parties for him, riding him while adorned with Alexander's breastplate, and planning to make him a consul. Bucephalus is referenced in art and literature. Paintings of Charles Le Brun's Alexandrine subjects, including Bucephalus, survive today in the Louvre. One
Frederick I, Holy Roman Emperor from the donkey. To add to this debasement, they were made to announce, ""Ecco la fica"" (meaning "behold the fig"), with the feces still in their mouths. It used to be said that the insulting gesture, (called fico), of holding one's fist with the thumb in between the middle and forefinger came by its origin from this event. Frederick's first marriage, to Adelheid of Vohburg, did not produce any children and was annulled. From his second marriage, to Beatrice of Burgundy, he had the following children: Frederick I, Holy Roman Emperor Frederick I (, ; 1122 – 10 June 1190),