Marina the Monk was a 5th-century Christian saint from Bithynia who lived in the Byzantine Empire. To pursue a life of monastic devotion, she disguised herself as a man named Marinos and lived within a monastery in the Kadisha Valley. She spent many years practicing asceticism, including fasting and intense prayer, while maintaining her secret identity. Her life is characterized by her profound commitment to her religious vocation and her willingness to endure hardship and false accusations to preserve her chosen way of life.