Regilla spent her remaining years living and travelling around Greece. When she lived in Athens, she was awarded as a priestess of the goddess
Tyche and the venerable, long-established office of priestess of Demeter Chamyne in
Olympia, Greece in 153. As a priestess of Demeter Chamyne, Regilla was the only woman officially present at the Olympic Games. Regilla sat on or near the altar of Demeter Chamyne on the north side of the stadium in Olympia opposite on the stand of the judges to view the competitions. Being a priestess serving Demeter Chamyne, was a great honor and was quite physically demanding. Using her own considerable influence and wealth, Regilla erected a great
nymphaeum (a monumental fountain) at Olympia. Her husband constructed an aqueduct that fed the nymphaeum. The fountain that Regilla built made the cool refreshing water available to the people in this hot, dusty area. In the centre of the nymphaeum stood a life-sized statue of a bull. On that bull there is an honorific inscription dedicated to Regilla stating: “Regilla, priestess of
Demeter, dedicated the water and the things around the water to Zeus”. At Olympia, bulls were sacrificed at the Temple of
Zeus, the chief divinity of Olympia. The fountain that Regilla built had two levels of niches bearing statues and a columnar façade. Statues have survived from the monument. The central niche on each level held a statue of Zeus, surrounding by portrait statues on each side. The lower level contained the Roman Emperor
Antoninus Pius and the ancestors and descendants of the emperor. These included the previous Roman emperor
Hadrian; Hadrian's cousin-wife
Vibia Sabina; the Roman empress
Faustina the Elder; the daughter of the elder Faustina and Antoninus Pius,
Faustina the Younger; and Antoninus Pius’ adopted son and son-in-law, the future Roman emperor
Marcus Aurelius. This level also showed several children of Marcus Aurelius and Faustina the Younger, in particular their first daughter
Annia Galeria Aurelia Faustina (aged about 7 but shown as a young adolescent). On the upper level, paralleling the imperial family, were statues of Regilla, Herodes Atticus, Regilla's parents, Regilla's maternal grandfather and Herodes Atticus’ parents. There were four statues of the children of Regilla and Herodes Atticus, named Elpinice, Athenais, Atticus Bradua and Regillus. The life-sized statue of the bull and the statues from the fountain are on display at the
Archaeological Museum of Olympia. Regilla's consul brother brought charges in
Rome against his brother-in-law, alleging that Herodes Atticus had ordered her to be beaten to death. Herodes was acquitted after defending himself at the trial. This followed an earlier legal case in which the emperor,
Marcus Aurelius, had exonerated Atticus - his old tutor. ==Posthumous honors and legacy==