With this commentary Thomas G?rtner presents the third and final volume on "Johannis" Coripps. The monograph Studies in the Structure and Historical Material of Corippus' "Johannis", published in 2008, is now followed by both the critial edition (UaLG 91) and this commentary presenting the historical and poetical sources for Coripps' epic on the deeds of the Byzantine general Johannes Troglita. A comparison with the omnipresent literary prototypes...