[NEWS] Pope visits Knots Grotto made in his honor EARLIER: Song dedicated to now-famous grotto

From Philly.com: 

Pope Francis made an unscheduled stop at the Mary, Undoer of Knots Grotto in front of the Cathedral Basilica of Saints Peter and Paul.

He was greeted by Sister Mary Scullion of Project Home and volunteers.

"Oh my God," Scullion said, overwhelmed with emotion. "I am so happy for all of us."

The pope's visit lasted minutes.