Complex sentence: According to the Tantra Charumani the small images of the Bari Patan Devi Temple, Patna are the Goddess Mahakali, Mahalakshmi and Mahasaraswati who once protected Putraka, who was the founder of Pataliputra.
Split into simpler sentences: According to the Tantra Charumani the small images of the Bari Patan Devi Temple, Patna are the Goddess Mahakali, Mahalakshmi and Mahasaraswati. In Hindu mythology, these Goddesses protected Putraka, who was the founder of Pataliputra.