"the opulent Atticus"

This refers to Tiberius Claudius Atticus Herodes (65-c160 AD), who was one of the first native Greeks to enter the Roman Senate, serving as Suffect Consul in 132 AD. His father, Hipparchus, was reputed to have been one of the wealthiest men in the Empire. Atticus's son, who is mentioned here, is Lucius Vibullius Hipparchus Tiberius Claudius Atticus Herodes (usually known simply as Herodes Atticus) who, among other public works, commissioned the building of the theatre that bears his name, standing on the south side of the Acropolis.