In ancient Rome the laws against incest, like many Roman laws, were harsh. In the early years of the Republic, people who had committed incest were forced to kill themselves. And in the first century B.C., offenders were thrown from the cliffs at Tarpei. Constantine's sons also imposed the death penalty, and Theodosius (A.D. 379-395), who made Christianity the state religion, used death by burning. Perhaps the most famous unpunished case of incest in ancient Rome is that of Caligula (A.D. 37-47), who married his sister Agrippina, who, as the wife of Claudius and Dowager Empress also had sexual relations with her own son by an earlier marriage, the future Emperor Nero.