Pope Leo XIV canonized Carlo Acutis, who died in 2006 at age 15, and Pier Giorgio Frassati, who died in 1925 at age 24.

Pope Leo declared 15-year-old Carlo Acutis a saint on Sunday, Sept. 7, the first such ceremony of his tenure, canonizing the first Catholic saint of the millennial generation, elevating him to the same level as Mother Teresa and Francis of Assisi .

Carlo, a British-born Italian who died from leukemia in 2006 at age 15, had been set to be canonized April 27 during the Jubilee of Adolescents. The ceremony was postponed after the death of Pope Francis on April 21.

Carlo, sometimes referred to as "God's influencer," learned several computer coding languages before his death and built websites to spread his faith.

He was canonized alongside Pier Giorgio Frassati, a yo

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