The region that is now Lebanon, as with the rest of Syria and much of Anatolia, became a major center of Christianity in the Roman Empire during the early spread of the faith. During the late 4th and early 5th century, a hermit named Maron established a monastic tradition focused on the importance of monotheism and asceticism, near the Mediterranean mountain range known as Mount Lebanon. The monks who followed Maron spread his teachings among Lebanese in the region. These Christians came to be known as Maronites and moved into the mountains to avoid religious persecution by Roman authorities. During the frequent Roman-Persian Wars that lasted for many centuries, the Sassanid Persians occupied what is now Lebanon from 619 till 629.