Pope Leo XIV leads the traditional Sunday Angelus prayer from the window of his office overlooking St Peter’s Square, a day after being discharged from Agostino Gemelli University Hospital in Rome. (EPA Images pic)VATICAN CITY: Pope Leo XIV addressed thousands of people in St Peter's Square on Sunday, smiling and saying he would resume work "gradually" in his first major public appearance since undergoing lung cancer surgery.

The 71-year-old pope had part of his right lung removed in the surgery on Tuesday at Rome's Gemelli hospital and he was discharged on Saturday.

"I would like to thank all the people who have been praying for me in these days," the leader of the world's 1.4 billion Catholics told the crowd.