Saving Michelangelo's Domeby Wayne Kalayjian St. Peter’s Basilica is one of ... the 16 years it took for the construction of the dome of the cathedral in Florence. Kalayjian is a structural ...

Four hundred and ninety-one steps rise to the top of St. Peter’s’ dome. The stairs are not for the easily unnerved. In some spots, the “staircase” is so narrow there's no room for railings ...