Today the attending physician makes that determination. However, the camerlengo will still call the Christian name of the pope three times and, if there is no response, will declare that the pope is dead.
Pope John XIIII declared the 2000 Jubilee Year.
Pope Julius I
Pope John Paul II declared Juan Diego a saint.
Otto I got declared the Roman Emperor because he helped the Pope when he was struggling so the pope declared him the Roman Empire.
He was elected as pope on April 19, 2005.
the pope
The Pope
No
Pope Julius I
he helped the pope and the pope declared him as a emperor
He was declared a Doctor of the Church in 1298 by Pope Boniface VIII.
Pope Leo X, who was pope from March 9, 1513, to December 1, 1521, excommunicated Luther.