Orthodox and Greek Catholic believers on Thursday celebrated the Three Holy Hierarchs (Basil the Great, Gregory the Theologian and John Chrysostom), who are regarded as creators of Orthodoxy, their lives and teachings being models of faith, Agerpres informs. All the three hierarchs lived at the same time, in the 4th century, being very familiar with the Scriptures, the sciences and philosophy of their time. They are also celebrated separately: St Basil, on January 1, St Gregory the Theologian, on January 25 and St John Chrysostom, on November 13 and January 27. The commemoration of the Three Holy Hierarchs was established for January 30 by Bishop John at the time of Emperor Alexius Comnenus. They think that this way the three calls of Orthodoxy were gathered in one single voice: the call to the monastic life of St Basil, the lofty theology of St Gregory and the practical Gospel of St John.