The "Rule of St. Basil" is a set of guidelines for monastic life attributed to St. Basil the Great, a Christian bishop from the 4th century. It emphasizes communal living, prayer, and the importance of community service. The rule aims to create a balanced life of work, worship, and study among monks. This rule has significantly influenced Eastern Orthodox monasticism and is still followed in many Eastern Orthodox monasteries today. It promotes virtues such as humility, obedience, and charity, guiding monks in their spiritual development and daily practices within the monastic community.