The Vatican on Sunday released the first photograph of Pope Francis in more than a month, showing the pontiff in a three-quarter view from behind wearing a purple stole typical of Lenten liturgical vestments and sitting in a wheelchair before the altar of his personal hospital chapel.

The release of the photo a month into his treatment came after dozens of young people gathered under the pontiff’s windows to offer wishes for a quick recovery.

Pope Francis is registering new slight improvements in his monthlong treatment for pneumonia in both his lungs, the Vatican said Monday, as it also provided some details on the first photo of the pope released since his hospitalization.