The Treaty of Barcelona was a pact of alliance between Holy Roman Emperor Charles V and Pope Clement VII that was signed in Barcelona on June 29, 1529.Barraclough, Geoffrey. The Medieval Papacy. New York: Harcourt, Brace & World, 1968.

Charles V and Pope Clement VII declared their intent to bring peace to Italy and to repel the Ottoman advances.Mourret, Fernand. History of the Catholic Church. St. Louis, Mo.: B. Herder, 1945). In return for Charles V's commitment to restore the Medici in Florence, Pope Clement VII restored Charles's investiture of Naples and made him receive Ravenna, Modena and Rubiera.Mourret, Fernand. History of the Catholic Church. St. Louis, Mo.: B. Herder, 1945).

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