ludi Megalesia (day 1 … associated with the next item, obviously)
204 B.C. — the image and cult of the Mater Magna (a.k.a. Cybele) is brought to Rome during the conflict with Hannibal on the advice of the Sybilline books
37 A.D. — the ashes of Tiberius are placed in the Mausoleum of Augustus
186 (or 188) A.D. — birth of the future emperor Septimius Bassianus (later known as M. Aurelius Antoninus Caesar; better known as Caracalla)