A Siddhar is a revered figure in Tamil spiritual tradition, known for their mastery in yoga, alchemy, and mysticism. Siddhars are believed to possess extraordinary powers and insights, often achieving a state of enlightenment. They are associated with the ancient practice of Siddha medicine, which combines herbal remedies and spiritual healing. Siddhars are often depicted as wandering ascetics, sharing their wisdom through poetry and teachings. Their contributions to Tamil literature and philosophy are significant, with many texts attributed to them. Notable Siddhars include Agastya and Thirumoolar, who are celebrated for their profound spiritual insights and practices.