Answer:
The first Roman emperor to use portraitures for communicating his ideologies to the Roman populace was emperor Augustus
Step-by-step explanation:
Emperor Augustus made use of portrait sculptures as a means of communicating certain ideologies to the Roman people. One of his famous portraits is referred to as the Augustus of Primaporta of 20 B.C.E. In this portrait, the emperor portrays himself as a staunch supporter of Roman catholic religion.