Cardinal Giovanni Morone (1509-80) remains one of the most intriguing characters in the history of the sixteenth century Catholic Church - with neither his contemporaries nor subsequent scholars being able to agree on his motivations, theology or his legacy. Appointed Bishop of Modena in 1529 and created Cardinal in 1542 by Pope Paul III, his glittering career appeared to be in ruins following his arrest in 1557 on charges of heresy. Yet, despite spending more than two years imprisoned in Castel Sant' Angelo, he managed to resurrect his career and in 1563 was appointed principal legate to the...