The 88-year-old head of the Roman Catholic Church was recently discharged from Rome's Gemelli Hospital, where he spent five weeks receiving treatment for an infection that led to double pneumonia.
"Jill and I join Catholics and others around the world in mourning the passing of Pope Emeritus Benedict XVI. He'll be remembered as a renowned theologian, with a lifetime of devotion to the Church, guided by his principles and faith. May he continue to be an inspiration to all," Biden tweet
"With sorrow I inform you that the Pope Emeritus, Benedict XVI, passed away today at 9:34 in the Mater Ecclesiae Monastery in the Vatican. Further information will be provided as soon as possible," Vatican News tweeted.