Note 040
The fondness of Caracalla for the name and ensigns of Alexander, is still preserved on the medals of that emperor. Spanheim, de Usu Numismatum, Dissertat. xii. Herodian (1. iv. p. 154) had seen very ridiculous pictures, in which a figure was drawn, with one side of the face like Alexander, and the other like Caracalla.
Note to Chapter 6 of DECLINE & FALL by Gibbon