Answer:
Ara Pacis.
Step-by-step explanation:
Ara Pacis is a Roman marble sculpture dedicated in 9 BCE. The sculpture is a masterpiece. The sculpture was built in the honor of Augustus when he returned from Spain and Gaul. 
Ara Pacis Augustae is a Latin phrase for the Altar of Augustan Peace. 
The relief sculpture on the Ara Pacis is symbolic and gives a message of family and marriage to the Roman people. 
So, the correct answer is Ara Pacis.