Processional frieze showing members of the Imperial household. Agrippa (veiled), his wife Julia behind him, The South Wall has seen a great deal of scholarship and the greatest number of academic debates. Some half dozen figures are recognizable from looking at other surviving statues of members of the imperial family. Nevertheless, much debate has taken place over many of these figures, including Augustus, Agrippa, Tiberius, Julia, and Antonia. Ara Pacis Augustae is an altar in Rome dedicated to Pax, the Roman goddess of Peace. The monument was commissioned by the Roman Senate on July 4, 13 BC to honor the return of Augustus to Rome after three years in Hispania and Gaul, and consecrated on January 30, 9 BC. Originally located on the northern outskirts of Rome, a Roman mile from the boundary of the pomerium on the west side of the Via Flaminia, it stood in the northeastern corner of the Campus Martius, the former flood plain of the Tiber River and gradually became buried under 13 feet of silt deposits. It was reassembled in its current location in 1938.