In Catholic tradition, patron saints are holy men and women whose lives and intercession are considered especially suited to particular needs, groups, or situations. The Church's practice of invoking saints reflects the doctrine of the Communion of Saints — the belief that the faithful departed remain united with the living in the one Body of Christ and can intercede before God on our behalf.
The designation of a patron saint for "Monks" reflects centuries of Catholic popular devotion and, in many cases, formal proclamations by popes or bishops recognizing a saint's particular connection to this intention through the circumstances of their life, death, or documented miracles.
Formally proclaimed patronage — sourced from canonized saints in the Roman Calendar.
Saint Basil the Great is invoked as patron of monks. Basil was born about 330 into a family of saints in Cappadocia: his grandmother Macrina the Elder, his parents Basil the Elder and Emmelia, his sister Macrina the Younger, and his brothers Gregory of Nyssa and Peter of Sebaste are all venerated as saints. He studied rhetoric at Caesarea, Constantinople, and Athens, where he formed his lifelong friendship with Gregory of Nazianzus.After visiting the monks of Egypt, Syria, and Mesopotamia, Basil withdrew to Pontus to live an ascetic life. Sources: https://www.vatican.va/content/benedict-xvi/en/audiences/2007/documents/hf_ben-xvi_aud_20070704.html.
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