Decebalus on Trajan's Column
Figure 27 in The Enemies of Rome from Hannibal to Attila the Hun by Philip Matyszak
27 Probably Decebalus, king of Dacia, shown here in Trajan's column. Note the distinctive headgear of those about the king, and the typically ornamented Dacian shield.
See also A Dacian Infantryman in The Armies and Enemies of Imperial Rome by Phil Barker & Ian Heath, based on Trajan's Column.
Dacians and Bastanians on the Adamklissi Friezes Tropaeum Traiani
Other Ancient Illustrations of Costume and Soldiers