Galileo Galilei
Maria Celeste
Sagredo Niccolini
Ambassador Viglienna
First Inquisitor
Father Riccardi
Libri
Prince Cesi
Magini
Carlo Barberini
Vanetti
Major Domo
Cardinal Barberini , later Pope Urban VIII
Cardinal Borgia
Landini
Cardinal Del Monte
Mother Superior
Francesco Barberini
The Page
Archbishop of Naples
John Milton
Cardinal Bellarmin
Father Firenzuola
D'Elci