The black-and-white photograph from 1917 shows the children (from left to right): Lucia Dos Santos (1907–2005) and her cousins Francisco Marto (1908–1919) and Jacinta Marto (1910–1920). Between May 13 and October 13, 1917, Mary is said to have appeared to them six times in the Cova da Iria near Fatima.
The Children of Fatima, black-and-white photography, 1917, photographer: Joshua Benoliel (1873–1932); source: Ilustração Portuguesa 610 (1917) at Wikimedia Commons, https://commons.wikimedia.org/wiki/File:ChildrensofFatima.jpg, public domain.