With VR glasses, you can travel inside iconic structures and witness in-depth details not visible from the ground: vaults, paintings, windows, and sculptures near the buildings' ceilings.
After meeting the Pope, they say they're only more inspired to keep spreading their music worldwide.
This year the concert will feature Spanish artist José Carreras and Amy Lee of the rock band Evanescence.
In her portraits, Tsarkova tries to give a little window into the lives of the popes.