Gran Premio di Milano
The colt began his career in racing at age two in Italy where he had one win in four of his 1963 starts with a third-place finish in Italy's most important race for his age group, the Gran Criterium. Racing at age three in 1964, Prince Royal won his first three starts before finishing fourth in the Gran Premio d'Italia. He came back to win the Gran Premio di Milano and ran away from the opposition to win the Premio Besana by fifteen lengths.