it was the etruscan priest Cornelius that sacrified the holy cow, holifying the Temple of Diana, upon the Aventine Hill, to mark the foundation of the Latin League, in the 7th c B.C., as it is said of the prophet, that:
That man’s city was destined to become the greatest in all of Italy and its mistress.
Cornelius had of course stolen the cow from a sabian farmer, but once the cow had been sacrified of the hand of Cornelius, Rome became the city of all eternity.
It still is,
and we are still around.