Sanctuary of Our Lady of Lourdes

The Sanctuary of Our Lady of Lourdes (French: Sanctuaire de Notre-Dame de Lourdes; Occitan: Santuari de Nòstra Senhora de Lorda) is a Catholic Marian shrine and pilgrimage site dedicated to Our Lady of Lourdes in the town of Lourdes, Hautes-Pyrénées, France. The sanctuary includes several religious buildings and monuments around the grotto of Massabielle, the place where the events of the Lourdes apparitions occurred in 1858, among them are three basilicas, the Basilica of Our Lady of the Immaculate Conception, the Rosary Basilica and the Basilica of St. Pius X, respectively known as the upper, lower and underground basilica.

The sanctuary is a destination for sick and disabled pilgrims as the Lourdes water, which has flowed from the grotto since the apparitions, is reputed for miraculous healings. The area is owned and administered by the Roman Catholic Diocese of Tarbes-et-Lourdes, and has several functions, including devotional activities, offices, and accommodation for sick and disabled pilgrims and their helpers. In addition to the grotto and the three basilicas, the sanctuary includes fountains providing Lourdes water, baths for immersion in the water, an esplanade for processions, a calvary, the offices of the Lourdes Medical Bureau, and several places of worship in a 52-hectare (130-acre) area.

The sanctuary of Lourdes is one of the most-visited Catholic shrines in the world, with around four million tourists coming every year. The grotto of Massabielle, which is the most famous site in the sanctuary, has hundreds of replicas around the world, known as "Lourdes grottos".