The canonisation of Pier Giorgio Frassati and Carlo Acutis will take place in St Peter’s today, in a ceremony expected to draw tens of thousands of pilgrims from across the world.

Pope Leo XIV will preside over the Eucharistic celebration at 10 a.m. on Sunday, the 23rd Sunday in Ordinary Time. During the Mass, the Holy Father will pronounce the solemn formula of canonisation, officially inscribing Frassati and Acutis into the catalogue of saints of the Catholic Church.

The order of service reveals a liturgy of extraordinary scale and detail. The altar will be adorned with a gold antependium, papal insignia, and large tapestries bearing the images of the two new saints—Frassati on the left, Acutis on the right. Relics of both will be presented alongside a statue of the Blessed Virgin Mary, a reminder of their devotion to Our Lady.