13 August 1917, Thousands of people gathered in Fátima based on reported Marian apparitions and claimed to see bizarre solar activity. Catholic bishop José Alves Correia da Silva declared the miracle "worthy of belief" on 13 October 1930, and the primarily Catholic witnesses described the event in religious terms. Despite the many photographers present in the crowd, no unusual photo of the sun was captured. Later, Jacques Vallée, Joaquim Fernandes and Fina d'Armada would interpret it as a mass UFO sighting