St. Peter's Basilica set to shine for 400th anniversary

Artisans at the Vatican Mosaic Studio restore St. Peter's Basilica’s vast 10,000 square meters of mosaics with meticulous attention to color and authenticity.

Ahead of the basilica's 400th anniversary, conservators clean gold surfaces and refresh hidden details so the landmark shines once more, a never-ending task carried out even as tourists gather above.