Pope Francis had a restful fifteenth night in Rome's Gemelli hospital, where he is being treated for bilateral pneumonia.

"As in recent days, the night passed calmly, and the Pope is now resting," said a Holy See Press Office statement on Friday morning.

According to the Thursday evening press release, the Pope's clinical condition continued to improve, though it remains "complex." 

The Press Office added that his prognosis remains guarded, noting that his therapy is continuing.

He spent Thursday afternoon in prayer and attending to various work-related activities.