From birth Flavius Valerius Constantinus, who became Constantine I, was a worshiper of the sun. Although he accepted Christianity as early as 313, he remained a syncretist and harmonised christianity and the cult of the sun. His absolute conversion to Christianity, in which he forsook all other beliefs, occurred, dramatically, on his deathbed in 337 AD. Constantine I was instrumental in steering Christians from a powerful though persecuted minority to effective supremacy.
His Byzantine Empire, at its height, under the guidance of his Progeny, dominated the Balkan Peninsula, Asia Minor, Crete, Cypress and Southern Italy. Thanks to Constantine, and his love for it, the Greek culture was kept alive during the dark ages, and helped kindle the western renaissance.