Pope Pius XII died on 9 October 1958 of acute heart failure brought on by a sudden myocardial infarction in Castel Gadolfo, the Papal summer residence. His doctor Gaspanini said afterwards: "The Holy Father did not die because of any specific illness. He was completely exhausted. He was overworked beyond limit. His heart was healthy, his lungs were good. He could have lived another 20 years, had he spared himself." WI Pius XII didnt exhausted himself and continued living till 1970s reaching an age of 90+ (remember Pope Leo XIII died aged 93 which is unusual for Popes...) Thar means certainly no Pope John XXIII and possibly no Pope Paul VI (he would be near 80 years old so he would be an unlikely papabili)... Who gets to succeed him then and what would be Church's situation when Pius XII dies almost a centenarian?