Our Lady of Lourdes Basilica, Poondi, is a Catholic pilgrimage centre located in Tamil Nadu, South India. Poondi is a small village located in Thiruvaiyaru Taluk (also spelled as Taluka), about 35 km away from Thanjavur.
Rev. Fr. Constantine Joseph Beschi S.J., an Italian Jesuit missionary, built the Church of Mary Queen of Immaculate Conception between 1714 and 1718. Poondi Madha Shrine was officially classified a Minor Basilica by Pope John Paul II on 3 August, 1999.