The Illyrian Armorials (Serbo-Croatian: Ilirski grbovnici) are a group of armorials compiled from mainly fictional medieval coats of arms, among which there can be found several actual coats of arms, during the late 16th to mid 18th century. They are all copies based on alleged lost original of the Ohmučević Armorial (Ohmučević grbovnik), commissioned by Petar Ohmučević (died 1599), a person of Ragusan origin, who went to become an admiral of Spanish court and navy at some point between 1584 and 1594. It is an example of the earliest ("Interconfessional") form of Illyrism idea and notion of so-called "Illyrian Empire", which formed the ideological basis for both the later rise of nationalism in the Balkans among its South Slavs, and the idea of unification.