This uprooting raises the question of why Calvinus was permitted to displace such a venerable shrine. The Church Fathers associate Mutunus with groupings of other deities that are assumed to be based on the lost theological works of Varro. Through examining these connections, Robert Palmer concluded that the old cult of Mutunus was merged with that of Father Liber, who was variously identified with or shared attributes with Jupiter, Bacchus, and Lampsacene Priapus. Palmer further conjectured that it was Mutunus, in the form of Liber, to whom Julius Caesar made sacrifice on the day of his assassination, receiving the ill omens that the conspirator Decimus Brutus urged him to ignore. Caesar had previously celebrated his victory at the Battle of Munda on the Liberalia, or festival of Liber held March 17, and he visited the house of the pontifex Calvinus on the Ides of March, near the archaic shrine of Mutunus-Liber. In Palmer's view, the evident ill favor of the god gave Augustus license to reform the cult during his program of religious revivalism that often disguised radical innovations. The god was then Hellenized as Bacchus Lyaeus.Robert E.A. Palmer, "Mutinus Titinus: A Study in Etrusco-Roman Religion and Topography," in Roman Religion and Roman Empire: Five Essays (University of Pennsylvania Press, 1974), pp. 187–206.
