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

Like his predecessors, Pope Francis was selected using an age-old method -- a system known as the Papal conclave.

As Pope Francis remains in critical condition with early kidney failure, the events of “Conclave” have never felt more timely. The cast of the movie, who took home the top honor of best film ensemble at Sunday night’s SAG Awards,