its dome or cupola was designed by mikkel angelo when it was designed in 1590, some 20 years after mickangelo had died. i think after his death only the drum of the dome was completed. it's the second largest church in the world. it's a monument to the apostle peter. remember, god said the church would be built on the rock peter was built. the basilica sits on the hallowed grounds of an earlier church built by em per or constantine in the 14th century. below it lies the vatican any crop lus. it's a maze of mausoleums and crypts and was only first discovered during an excavation in 1939. and at the end of this narrow underground passageway, a small tomb was discovered, and in 1968 pope paul vi announced that the tomb did, in fact, hold the bones of st. peter. and that altar, by the way, was built so it's directly above the tomb of st. peter. we're going to take you more inside for a tour in just a little while. also a rare behind t-the-scenes day in the life of the pope, x. we're going to bring back archbishop timothy dolan back in a few minutes and talk about the things affecting the ca