Dan Vadis was successful in the Peplum sword and sandals genre despite beginning his film career in the waning days of that genre. He later transitioned to westerns and made a number of Hollywood films including "'High Plains Drifter,' 'Broncho Billy,' "The Gauntlet' and 'Every Which Way You Can," all starring Clint Eastwood.
Although the score is credited to Carlo Savina, for the English dubbed version released in the U.S. as "Spartacus and the Ten Gladiators" (1964), the opening score is recycled from Sergio Leone's "The Colossus of Rhodes" (1961) composed by Angelo Francesco Lavagnino.
As mentioned above, although Carlo Savina is credited with the score, he seems mainly to have conducted selections of previous Italian epic scores by Angelo Francesco Lavagnino and Carlo Innocenzi. The main title is indeed a reprise of the main title from The Colossus of Rhodes (1961) (Lavagnino). Then the opening gladiator march is from The Ten Gladiators (1963) (again Lavagnino). And the choral finale is the choral main title from Revolt of the Mercenaries (1961) (Innocenzi).
Italian censorship visa #44438 of December 23, 1964.