Gian Galeazzo Sforza (June 20, 1469 - October 21, 1494), the third duke of Milan of the Sforza family, was only 7 years old when he became the duke in 1476, after the assassination of his father, Galeazzo Maria Sforza. His brother, Lodovico Sforza, soon gained the real power. In 1488, Gian married princess Isabella of Naples. She was unsatisfied with their lack of power and called for help from her family in Naples. This caused Ludovico the Moor to look around for help, spurring the invasion of Italy under Charles VII of France. June 20 is the 171st day of the year (172nd in leap years) in the Gregorian Calendar, with 194 days remaining. ... Events July 26 - Battle of Edgecote Moor October 17 - Prince Ferdinand of Aragon wed princess Isabella of Castile. ... October 21 is the 294th day of the year (295th in leap years) in the Gregorian Calendar, with 71 days remaining. ... 1494 was a common year starting on Monday (see link for calendar) of the Gregorian calendar. ... Milan (Italian: Milano; Milanese dialect: Milán) is the main city in northern Italy, and is located in the plains of Lombardy, the most populated and developed region in Italy. ... Sforza was a ruling family of Renaissance Italy, based in Milan. ... Galeazzo Maria Sforza (January 24, 1444 – December 26, 1476) was Duke of Milan. ... Ludovico Sforza (Ludovico il Moro, The Moor) (July 27, 1452–May 27, 1508), a member of the Sforza dynasty of Milan, Italy, was the second son of Francesco Sforza, and was famed as patron of Leonardo da Vinci and other artists. ... Isabella di Aragona (1470-1524), was born a Princess of Naples, granddaughter of king Ferrante I of Naples and daughter of the future king Alfonso II of Naples. ... Naples (Italian Napoli, Neapolitan Napule, from Greek Νέα Πόλις - Néa Pólis - meaning New City; see also List of traditional Greek place names) is the largest city in southern Italy and capital of Campania Region and the Province of Naples. ... Charles VII the Victorious, a. ...