Under subsequent emperors, Games were celebrated on both the Augustan and the Claudian systems. Domitian held his in AD 88, possibly 110 years from a planned Augustan celebration in 22 BC, and he was followed by Septimius Severus in AD 204, 220 years from the actual Augustan celebration. On both occasions, the procedure used in 17 BC was followed closely. Antoninus Pius in 148 and Philip I in 248 followed Claudius in celebrating the 900- and 1000-year anniversaries of Rome's foundation, respectively. These involved rituals at the Temple of Venus and Roma instead of the Tarentum, and the date was probably changed to April 21, the Parilia.