 The armorial combines historical (late medieval) with fictional coats of arms to construct the notion of an "Illyrian Empire".This Empire happened to coincide exactly with the sphere of interest of the Spanish Empire in the Balkans at the time, and hence also Petar's own.The personal purpose pursued by Petar Ohmućević was that of confirming his own "Illyrian" nobility after he rose to the rank of admiral in the Spanish navy.