The Sanctuary of Our Lady of Fátima is a significant Catholic pilgrimage site located in Fátima, Portugal. It was built to honor the appearances of the Virgin Mary to three shepherd children—Lúcia dos Santos, Francisco Marto, and Jacinta Marto—in 1917. The sanctuary includes the Basilica of Our Lady of the Rosary, which houses the tombs of the three visionaries. The sanctuary attracts millions of visitors each year, who come to pray and seek spiritual solace. It features various chapels, a large square, and a candlelight vigil that takes place every evening. The site is recognized for its role in promoting the message of peace and conversion associated with the Marian apparitions.