Vatican City, May 3, 2016 / 03:31 am (CNA).- Lead guitarist The Edge from Irish rock band sensation U2 played “the most beautiful parish hall in the world” this weekend – the Sistine Chapel.

The performance, the first-ever rock concert in the historic chapel, was given for about 200 doctors researchers who attended a conference at the Vatican last week on regenerative medicine. The conference discussed the use of adult stem cells to cure difficult and rare diseases such as cancer.