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, and there is no indication how long it may still last.

Pope Francis remains under treatment for a “polymicrobial” respiratory infection at Gemelli Hospital in Rome. Nicknamed “Vatican III” by John Paul II, this medical complex has been welcoming ailing popes since the 20th century in what resembles a “small city.