Pope Francis has spent 18 full days at Rome’s Gemelli hospital recovering from double pneumonia. It’s by far the longest hospitalization of his 12-year papacy.

A Mass was held in St. Peter's Basilica Friday in honor of Pope Francis as the 88-year-old marked two milestones this week: his 12-year anniversary as pontiff and the one-month mark since he was hospitalized for ongoing treatment of a respiratory infection.

Pope Francis marked the 12th year of his pontificate Thursday while still recovering from lung infection. The anniversary is a public holiday at the Vatican but no events were planned to celebrate the occasion.