Mantralayam's history is deeply intertwined with the life and teachings of Sri Raghavendra Swamy, a 17th-century Hindu saint. It is believed that he entered a state of Jeeva Samadhi here, meaning he consciously chose to be entombed alive. The Brindavan, his final resting place, is the heart of the Matha and a major draw for devotees. The site has since evolved into a significant religious center. The Matha has seen several additions and renovations over the centuries, but the core structure and its spiritual significance remain unchanged. The history of Mantralayam is a testament to the enduring legacy of Sri Raghavendra Swamy and his profound influence on the region.