The Sanctuary of Our Lady of Lourdes is a Catholic shrine located in the town of Lourdes in southern France. It is one of the most important pilgrimage sites in the world and attracts millions of visitors each year. The sanctuary is famous for the apparitions of the Virgin Mary to a young peasant girl, Bernadette Soubirous, in 1858. These apparitions were recognized as authentic by the Catholic Church and as a result, Lourdes became a major center of Marian devotion.

The sanctuary consists of various buildings and chapels, including the Grotto of Massabielle where the apparitions took place. The grotto is a place of prayer and reflection, and many visitors come here to leave their petitions and offer prayers to the Virgin Mary. There is also a large basilica, the Basilica of the Immaculate Conception, which was built to commemorate the apparitions and serves as a place of worship for the thousands of pilgrims who visit Lourdes each year.