 This viewpoint, that procreative sex within marriage is allowed, while every other expression of sexuality is sinful, can be found, for example, in St. Augustine. This understanding of permissible sexual relationships leads to a concern with the gender of one’s partner that is not found in previous Greek or Roman views, and it clearly forbids homosexual acts. Soon this attitude, especially towards homosexual sex, came to be reflected in Roman Law. In Justinian’s Code, promulgated in 529, persons who engaged in homosexual sex were to be executed, although those who were repentant could be spared. Historians agree that the late Roman Empire saw a rise in intolerance towards homosexuality, although there were again important regional variations.