Periyalvar was a revered saint and poet in the Tamil devotional tradition, known for his deep devotion to Lord Vishnu. He lived during the 9th century and is considered one of the twelve Alvars, who were instrumental in spreading the worship of Vishnu through their hymns and poetry. His works are primarily in the form of Tamil verses, expressing his love and devotion to the divine. Periyalvar is particularly famous for his compositions in the Nalayira Divya Prabandham, a collection of hymns dedicated to Vishnu. He is also known for his role as a spiritual guide to his daughter, Andal, who became a prominent figure in her own right. His legacy continues to inspire devotees and scholars alike.