Jacinta Marto was born on 1910-03-11 in the hamlet of Portugal, Aljustrel, part of the parish of Fatima Portugal, twenty-one months after her brother Francisco Marto.12 Together with Francisco and their cousin Lúcia (Fatima seer), she reported a series of visions beginning in spring 1916, when the three children were watching their herds on the Loca do Cabeço mountain and an apparition they described as an angel of peace appeared to them.3 A second appearance of the angel followed, during which Lúcia and Jacinta reported hearing its words while Francisco reported only seeing it,4 and a third occurred late in August 1916 on the mountain slope between Preguiça and Lapa de Cabeço overlooking Aljustrel.5
The apparitions the family became known for began on 1917-05-13 at Portugal, Fatima, Cova da Iria, when the three children, grazing sheep, witnessed a flash of light they initially took for lightning.6 This First apparition of Our Lady of Fatima (1917-05-13) lasted about ten minutes; only Lúcia reported speaking with the figure, Jacinta reported only listening, and Francisco reported seeing the figure’s lips move without hearing anything.7 Jacinta was unable to keep the children’s agreed silence and told her mother, Olimpia Marto, that she had seen “Our Dear Lady” soon after returning home;8 Olimpia responded by laughing and mockingly telling her daughter she was now a saint.9 A Second apparition of Our Lady of Fatima (1917-06-13) followed on 1917-06-13, which the children’s parents declined to attend for fear of public embarrassment if the vision proved false,10 and a Third apparition of Our Lady of Fatima (1917-07-13) on 1917-07-13 included, according to the record, a vision of hell and the revelation of what became known as the three secrets.11 The content of the Third Secret of Fatima was not made public for eighty years afterwards.12
In August 1917 the mayor of Ourém, Artur Santos, diverted a carriage carrying the three children and held them, reportedly threatening to throw them into boiling oil in an attempt to force them to disclose the secret.13 Jacinta was reported to have said that she and her siblings did not care if they were killed, since it would only send them to heaven sooner.14 The children were released without disclosing the secret, and a further apparition, treated as the 1917 Fatima Marian apparitions sequence, was reported near Valinhos shortly afterward.15 On 1917-09-27, the priest Manuel Formigao interviewed the three children separately and recorded their statements;16 Jacinta told him she had seen the Lady on the thirteenth of every month since May, and described a white and gold dress with the figure’s hands folded in prayer.1718
According to a “diplomatic version” published by Louis Emrich, the final apparition on 1917-10-13, an event associated with the Miracle of the Sun (1917-10-13), included a message warning of a coming period of severe punishment for humanity in the second half of the twentieth century.19 Manuel Pedro Marto, the children’s father, described Jacinta’s white dress with lace bows and recalled her being carried in a man’s arms through the crowd at Cova da Iria that day.2021 Lúcia and Jacinta reportedly told the assembled crowd that the ongoing war would end that day, though it continued for roughly another year.22
Jacinta later told her mother she had been thinking of a coming war in which many people would die, houses would be destroyed, and priests would be killed23 - a statement Michael Hesemann has argued could not have referred to knowledge her mother possessed at the time, given that the First World War had only just ended, but which he connects to the World War II that followed two decades later.24 In late 1918 Jacinta, Francisco, and their mother fell ill with the Spanish flu then spreading through Europe.25 Jacinta told Lúcia that Our Lady would soon take Francisco to heaven and that she herself would be sent to hospital to suffer;26 Francisco died on 1919-04-04 of a severe lung inflammation.27 Jacinta’s own health worsened. Manuel Formigao, who also served as her physician, described her as resembling a skeleton, permanently feverish, with tuberculosis consuming her weakened body.28 She was moved to Lisbon, admitted to the D. Estefania Hospital under the paediatrician Castro Freire on 1920-02-02,29 and operated on by him on 1920-02-10.30 Afterward she told the Mother Superior at the orphanage where she had been staying, Godinho (Mother Superior), that she felt better and that Our Lady had said she would soon relieve her pain.31 Jacinta Marto died on 1920-02-20.32
Her remains were reburied at the cemetery of Fatima on 1934-09-12,33 and when the coffin was opened for the Exhumation of Jacinta Marto’s body (1935-09-12) the following year, the body was reported to show no signs of decay.34 In 1951, after construction of the Basilica of Our Lady of the Rosary of Fatima, her remains and Francisco’s were transferred there.35 In a 1967 declaration, Cardinal Alfredo Ottaviani referred to Jacinta and Francisco as Lúcia’s “brother and sister."36 In 2000, Pope John Paul II beatified Jacinta and Francisco Marto in the Beatification of Jacinta and Francisco Marto (2000), a ceremony held on 2000-05-13 at which their images were displayed on the Basilica’s tower.3738 A miracle attributed to the two children, documented by the Vatican’s Congregation for the Cause of the Saints, formed part of the process advancing their path to sainthood.39
Later accounts placed particular weight on statements attributed to Jacinta during her final illness. Father Fuentes reported that Sister Lúcia told him the Virgin had said that many nations would vanish and that Russia would serve as the instrument of punishment if the world did not convert.40 One secondary account notes that two of the three child seers died young, as the apparitions were said to have predicted, while Lucia dos Santos lived to an advanced age secluded in a convent.41 A separate account describes the Fatima events as beginning with the nine-year-old Lucia Santos and her cousins Jacinta and Francisco reporting a vision of an angel in spring 1917,42 and states that the prediction that Jacinta and Francisco would die before reaching adulthood proved accurate.43