Dialogue Concerning the Two Chief World Systems

Let it be printed, if it so pleases the Most Reverend Father Master of the Sacred Apostolic Palace.
original: "Imprimatur si videbitur..."; the Master of the Sacred Apostolic Palace was the Pope’s chief theologian and censor in Rome, responsible for vetting all books printed in the city or by its authorities.

The Vicegerent was the deputy to the Cardinal Vicar of Rome, acting as a high-ranking administrator for the Church.

Let it be printed.

Niccolò Riccardi (1585–1639), nicknamed "Padre Mostro" (Father Monster) for his vast intellect, was the chief censor. His signature here was the result of years of negotiation with Galileo.

Let it be printed in Florence, the customary requirements having been observed.
September 11, 1630.
original: "ordinibus consuetis servatis"; this indicates that all local procedures for censorship and review had been successfully completed.

Let it be printed on the 11th day of September, 1630.

As the local representative of the Holy Office (the Inquisition), Egidi’s approval certified that the book was not seen as contrary to the Catholic faith at the time of printing.

Let it be printed, this 12th day of September, 1630.
original: "Stampisi"; unlike the previous Latin ecclesiastical licenses, this final authorization is in Italian, representing the civil or secular permission granted by the government of the Grand Duchy of Tuscany.

Secretary to the "Reformers of the University of Florence," the civil body that regulated the printing industry and bookstores.