His other children - Girolamo, Isabella and Pier Luigi - were of uncertain parentage.
Up to the year 1857 the fame of Guicciardini as a writer, and the estimation of him as a man, depended almost entirely upon the History of Italy, and on a few ill-edited extracts from his aphorisms. At that date his representatives, the counts Piero and Luigi Guicciardini, opened their family archives, and cornmitted to Signor Giuseppe Canestrini the publication of his hitherto inedited MSS.
Many of their fiefs he seized for himself, and he was implicated in the murder of Pier Luigi Farnese, duke of Parma (see Farnese), who had helped Fiesco.
But in 1549 Pier Luigi was assassinated by his outraged subjects, and the emperor thereupon claimed the two duchies for his son-in-law Ottavio Farnese, Paul's grandson.
The latter accepted the task, and the new administration included Signor Tittoni, late prefect of Naples, as foreign minister, Signor Luigi Luzzatti, the eminent financier, at the treasury, General Pedotti at the war office, and Admiral Mirabello as minister of marine.
The Author Of The System Adopted By Gregory Was Aloysius Lilius, Or Luigi Lilioghiraldi, A Learned Astronomer And Physician Of Naples, Who Died, However, Before Its Introduction; But The Individual Who Most Contributed To Give The Ecclesiastical Calendar Its Present Form, And Who Was Charged With All The Calculations Necessary For Its Verification, Was Clavius, By Whom It Was Completely Developed And Explained In A Great Folio Treatise Of 800 Pages, Published In 1603, The Title Of Which Is Given At The End Of This Article.
The Genoese admiral, Luigi de' Fieschi, was taken with 5 of his galleys, and others were wrecked.
He now set out once more for Scotland, but was intercepted by the Florentine cardinal Luigi Capponi, who induced him to remain at Bologna as professor of Humanity.
De Blainville added to the knowledge of the shells of the Paris basin; Giovanni Battista Brocchi (1772-1826) in 1814, and Luigi Bellardi (1818-1889) and Giovanni Michelotti (born 1812) in 1840, described the Pliocene molluscs of the subApennine formation of Italy; from Germany and Austria appeared the epoch-making works of Heinrich Ernst Beyrich (1815-1896) and of Moritz Hoernes (1815-1868).
In 1860, with the Cavour party, he opposed the work of Garibaldi, Crispi and Bertani at Naples, and became secretary of Luigi Carlo Farini during the latter's lieutenancy, but in 1865 assumed contemporaneously the editorship of the Perseveranza of Milan and the chair of Latin literature at Florence.