Incest, pedophilia, and zoophilia were banned in the middle ages.
Incest was banned to the 4th degree by Roman Law already, and to the 7th degree by the Roman Catholic Church (that is, siblings is 1st degree, nephews is 2nd degree, cousins is 3rd degree, 2nd cousins is 5th degree, 3rd cousins is 7th degree – so sharing great-grandparents was already ground for illicitness of relationship)
Age of consent was 12 for girls and 14 for boys, at the absolute minimum. Local authorities were free to establish a higher age.
Zoophilia, well...