The primitive church of Antioch computed almost 6000 years from the creation of the world to the birth of Christ. Africanus, Lactantius, and the Greek church have reduced that number to 5500, and Eusebius has contented himself with 5200 years. These calculations were formed on the Septuagint, which was universally received during the six first centuries. The authority of the Vulgate and of the Hebrew text has determined the moderns, Protestants as well as Catholics, to prefer a period of about 4000 years; though, in the study of profane antiquity, they often find themselves straitened by those narrow limits.