To honor his beautiful wife who died young. Regilla was her name. This is why, Herodes Αtticus built the theatre. Don’t get confused, he is not the same person with the Herod, the Roman king of Judea.
Herodes Atticus and Regilla -from the 2nd century until the present- have been considered great benefactors in Greece, and particular in Athens.
The couple are commemorated in Herodou Attikou Street and Rigillis Street and Square, in downtown Athens.
In Rome, their names are also recorded on modern streets.