5. AGNESINA, married in 1474 to Fabrizio Colonna, Lord of Marino, Duke of Albi and Tagliacozza. She inherited the talents and literary tastes which, as we have already seen, had descended to her mother, and transmitted them to a still more gifted daughter, the illustrious Vittoria Colonna, Marchioness of Pescara. Of this marriage was also born Ascanio Colonna, Duke of Palliano, who, in 1526 and 1529, set up claims upon Urbino, on the ground that his mother was an elder sister of the Prefectess Giovanna. 6. COSTANZA, married to Antonello Sanseverino, Prince of Salerno, and had a son born in 1507. Their grandson was the patron of Bernardo Tasso, whom we shall mention in chapter l. 7. CHIARA, a nun. 8. VIOLANTE, married to Galeotto Malatesta. Federigo's natural children were:-- 1. BONCONTE, a youth of singular promise and accomplishments, on whom, in absence of legitimate issue, were centred his father's hopes. Having been sent at fourteen to the court of Naples, he died there of plague. 2. ANTONIO, who was legitimated, along with his eldest brother, in 1454, and became a student. But soon devoting himself to arms, he attended his father in many campaigns, and especially in the fatal one of Ferrara. A cloud, however, came over his military renown at the battle of the Taro in 1495, where he misconducted himself under the banner of St. Mark. He married Emilia, youngest daughter of Marco Pio of Carpi, and died childless soon after 1500. His wife was the chief ornament of Urbino when its court was the model of intellectual refinement, and she will often be noticed in after portions of this work. Her charming social qualities are celebrated in prose and verse by Castiglione, and she is called by Bembo a magnanimous and prudent lady, remarkable for wisdom as for warm affection. The Duchess Elisabetta, whose friend and companion she had been, alike during the bright days of wedlock and the blight of widowhood, bequeathed to her in 1527 the liferent of Poggio d'Inverno, and appointed her an executrix of her will. Her portrait from a medal will be found in our second volume. 3. BERNARDINO, who died at Castel Durante, 1458. 4. GENTILE, a celebrated beauty, who married Agostino Fregoso of Genoa, and had the Montefeltrian fief of Sta. Agatha. Their sons, Ottaviano and Federigo Fregoso, will figure in our twenty-first chapter, and attained the respective dignities of Doge of Genoa and Cardinal. Ottaviano's posterity were Marquises of Sta. Agatha in the seventeenth century. BOOK THIRD OF GUIDOBALDO DI MONTEFELTRO, THIRD DUKE OF URBINO CHAPTER XIII The early promise of Duke Guidobaldo I.--Count Girolamo Riario assassinated--The Duke's marriage--Comparative quiet of Italy.