Vatican, Sept. 7 -- In a landmark ceremony at the Vatican on Sunday, Pope Leo declared Carlo Acutis, a teenage coder known as "God's influencer," the first saint representing the millennial generation.

Thousands of young worshippers from across the globe gathered in St. Peter's Square to witness the canonisation.

His devotion and digital evangelism continue to inspire Catholic youth, who now revere him alongside revered figures like Mother Teresa and St. Francis of Assisi.

Canonisation formally acknowledges that an individual lived a holy life and is now in heaven.

The canonisation of Acutis had initially been scheduled for April but was delayed following the death of Pope Francis on April 21.

Following the announcement, young Cathol...