The Sanctuary of Our Lady of Fatima is a significant Catholic pilgrimage site located in Fatima, Portugal. It was established to commemorate the apparitions 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 children, and the Chapel of the Apparitions, where the visions occurred. Each year, millions of pilgrims visit the sanctuary to pray and seek spiritual solace. The site is known for its peaceful atmosphere and is a center for various religious activities, including the Rosary and the Candlelight Procession. The sanctuary also promotes messages of peace and hope, reflecting the themes of the apparitions.