Was it diseased rats that sparked the beginnings of the Renaissance? Or was it an Italian poet named Petrarch as he poked around in dusty old books? What did a monk burning a papal bull have to do with the Reformation? Just what is a papal bull, anyhow? In this book, you'll read about rats and bulls (not the snorting kind) as well as artists, inventors, and a lot of other remarkable people who lived during the Renaissance and the Reformation.