Relating to Saint Basil or the monastic order and traditions that follow his rule.
From Basil of Caesarea, a 4th-century Christian theologian and monastic founder, + '-ian' (relating to). This religious term has been used since the Middle Ages to describe Eastern Orthodox and other Christian traditions.
Saint Basil wrote the monastic rulebook that shaped Eastern Christianity—when monks follow 'Basilian' traditions, they're literally following the 1,600-year-old instructions of one of Christianity's greatest theologians.
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