GUICCIARDINI, Luigi, nephew of the preceding, was born at Florence, in the year 1523. He held different employments under Alessandro de' Medici and his successor Cosimo II.; then he travelled, and remained a long time at Antwerp, where he obtained the favour of the Duke of Alba; but having reflected on this general's system of government, in a work which he published (Memoirs), he was thrown into prison, whence he was liberated only through the intercession of the Grand Duke of Tuscany. The remainder of his life presents no event worthy of notice, and seems to have been chiefly passed in the composition of his works. These are Memorie, &c., or Memoirs of what passed in Savoy from 1530 to 1565, Antwerp, 1665, in 4to. Raccolta dei Detti e Fatti notabili, 1581, in 8vo; Descrizione, &c., or Description of the Low Countries, Antwerp, 1567, in fol.; Ore di Recreazione, Florence, 1600, in 12mo. Luigi Guicciardini died in 1589.