Rome's Gemelli hospital, where Pope Francis is being treated for bronchitis, is the favoured choice of pontiffs -- to the point of being dubbed "Vatican III" by John Paul II. It is the fourth visit to the Gemelli since 2021 for the 88-year-old Francis,

Pope Francis was taken to hospital on Friday morning for tests and to continue treatment of his ongoing bronchitis, the Vatican said.

Pope Francis, battling double pneumonia, remains in a critical condition and his prognosis is still guarded because of the "complexity" of his clinical condition, the Vatican said on Sunday. The pope was admitted to Rome's Gemelli hospital on February 14 after having trouble breathing for several days and subsequently had pneumonia diagnosed in both lungs.