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In 1761 Maria Theresa made him administrator for life of the Bishopric of Vác, and at the same time obtained the cardinal's purple for him from Clement XIII.
Many leaders of the church have been alumni of the academy, including Popes Clement XIII, Leo XII, Leo XIII, Benedict XV, and Paul VI.
Clement XIII placed the Encyclopédie of D'Alembert and Diderot on the Index, but this index was not as effective as it had been in the previous century.