New Delhi, April 6 -- Pope Francis, who has been away from the public eye for a serious case of pneumonia, took everyone by surprise when he made his first and impromptu appearance at the Vatican Square.

Sitting on a wheelchair with an oxygen tube in his nose, Pope Francis was seen greeting his followers as he was wheeled through Saint Peter's Square. He also spoke with a few during his surprise appearance.

"A good Sunday to all. Thank you very much," the 88-year old pope said after a mass dedicated to the sick. While his voice felt strained but better than the time he left the hospital in March. His last public appearance was February 14.

While Pope Francis is supposed to be undergoing two months of convalescence, his appearance in pu...