The rites and rituals following the death of a pope, his funeral and burial, explained

[Dennis Donovan]

2. Hope they do a better job than they did with Pope Pius XII

https://en.wikipedia.org/wiki/Pope_Pius_XII#Botched_embalming

Botched embalming
Pius XII's physician, Riccardo Galeazzi-Lisi, reported that the pontiff's body was embalmed in the room where he died using a novel process invented by Oreste Nuzzi.

Pope Pius XII did not want the vital organs removed from his body, demanding instead that it be kept in the same condition "in which God created it". According to Galeazzi-Lisi, this was the reason why he and Nuzzi, an embalmer from Naples, used an atypical approach with the embalming procedure. In a controversial press conference, Galeazzi-Lisi described in great detail the embalming of the body of the late pontiff. He claimed to have used the same system of oils and resins with which the body of Jesus Christ was preserved.

Galeazzi-Lisi asserted that the new process would "preserve the body indefinitely in its natural state". However, whatever chance the new embalming process had of efficaciously preserving the body was obliterated by intense heat in Castel Gandolfo during the embalming process. As a result, the body decomposed rapidly and the viewing of the faithful had to be terminated abruptly.

Galeazzi-Lisi reported that heat in the halls, where the body of the late Pope lay in state, caused chemical reactions which required it to be treated twice after the original preparation. Swiss Guards stationed around Pius XII's body were reported to have become ill during their vigil.

/snip