ROME (AP) — Pope Francis remained in critical but stable condition Tuesday, with his blood parameters remaining stable as he works from the hospital while battling double pneumonia, the Vatican said.

Concerns over Pope Francis' health have mounted in recent years as have questions about his succession. Here's what we know.

Pope Francis "rested well" throughout the night and remained in a slightly improved condition on Tuesday morning as he continued to battle double pneumonia in hospital, the Vatican said."The Pope rested well,