A London birth and a Milanese boyhood
Carlo Acutis was born in London on 3 May 1991 to Andrea Acutis and Antonia Salzano, and was raised in Milan. His family was comfortable and, by his mother's own later account, not especially devout. She has said she had attended Mass only a handful of times in her life before her son's faith obliged her to take the question seriously. The devotion in that household ran upward, from the child to the parents.
He made his First Communion on 16 June 1998, at the age of seven, and from around that age asked to be taken to Mass daily. He was confirmed in 2003 and was teaching catechism to younger children by twelve. He attended the Jesuit-run Istituto Leone XIII in Milan.
The boy at the keyboard
Carlo taught himself to program. He worked through university-level computing manuals, wrote code, built in web design, and by fourteen was making websites for his parish and his school. He was a genuinely capable amateur engineer, not a boy who dabbled.
In 2004 he began the project he is remembered for: a catalogue of the reported Eucharistic miracles of the world, and of the Marian apparitions recognised by the Church, assembled and published online so that anyone could examine them. He worked on it for roughly two and a half years and pulled his family in to help. The travelling exhibition drawn from it was unveiled on 4 October 2006 at the Church of San Carlo Borromeo in Rome. He had eight days to live.
What he did with an ordinary life
He was not a solemn child. He played PlayStation, Xbox and Game Boy, liked Spider-Man and Pokemon, played football, took up the saxophone, and kept dogs. He also capped his own video game playing at two hours a week, having decided that the machine should not be permitted to own him.
He filled containers with food and carried them to men sleeping rough in Milan. He made a point of standing with children at school who were being bullied, particularly those with disabilities, and of drawing in a friend whose parents were divorcing. None of this was arranged for him by an adult.
Four days in October
In early October 2006 Carlo felt unwell, and it was taken for influenza. On roughly 8 October he was diagnosed with acute promyelocytic leukaemia, an aggressive cancer of the blood. Within days he suffered a brain haemorrhage and fell into a coma. He died on 12 October 2006 at the San Gerardo Hospital in Monza. He was fifteen.
Told what lay ahead, he answered that there were people who suffered a great deal more than he did. He asked that his suffering be put to use: I offer all of my suffering to the Lord for the pope and for the Church in order not to go to purgatory but to go straight to heaven.
To his mother, near the end, he said not to be afraid, because since Jesus became man, death had become the passage towards life.
Assisi, and what followed
He had asked to be buried in Assisi, which he loved for St Francis. His body was taken there and in 2019 laid in a tomb at the Sanctuary of the Spoliation, where it can be seen. He is dressed as he lived, in jeans and a pair of Nike trainers, which unsettles some visitors and is very much the point.
Two healings were investigated and approved as miracles through his intercession: a Brazilian boy, Matheus Vianna, born with a malformed pancreas, and Valeria Valverde, a Costa Rican student in Florence who suffered catastrophic head injuries in a bicycle accident and whose mother prayed at Carlo's tomb. He was beatified in Assisi on 10 October 2020, and canonised in St Peter's Square on 7 September 2025 by Pope Leo XIV, alongside Pier Giorgio Frassati. He is popularly called God's influencer, and the patron saint of the internet, though that last is affection rather than an official title.