Florence is a monument to the Renaissance, showcasing at every turn the art and architecture from that period, which continues to impress and inspire. It's clear what the Italian Renaissance looked like, but in the soaring Santa Maria Novella Basilica, "CBS Sunday Morning" got the rare chance to hear how it sounded, with music being heard for the first time in more than 400 years.

Mark Spyropoulos is director of Music and the Medici, and chief dreamer in this effort to unearth the until-now-unknown sacred music of this family who ruled this part of Italy 500 years ago.