John Wilkes describes the geography of Illyria and surveys the region in the prehistoric, Greek, Roman and medieval periods. He discusses Illyrian art, material, culture, religion and customs. A chapter examines the Illyrian language, of which little trace survives, and its connection with other Indo-European languages. Professor Wilkes also scrutinizes the linguistic evidence for the Illyrians' relatedness to other peoples - Thracian, Italic, Greek and Celtic. He concludes with a discussion of a possible survival of an Illyrian native culture in the Roman and Byzantine periods.