Louis XII invaded Italy in 1499: after Gian Giacomo Trivulzio had ousted its duke Ludovico Sforza, Cesare accompanied the king in his entrance into Milan.

Gian Giacomo Caprotti da Oreno, nicknamed Salai or Il Salaino (" The Little Unclean One " i. e., the devil ), entered Leonardo's household in 1490.

Two of Ludovico's daughters married to relevant figures: Geronima to Pier Luigi Farnese, illegitimate son of Pope Paul III and Marzia to Gian Giacomo Medici of Marignano, an important general of the Spanish army.

His early career connects itself in some measure with the rise of his elder brother, Gian Giacomo Medici, from the position of a mere bravo to that of Marchese di Marignano.

" Mercury and Herse ", scene from The Loves of the Gods by Gian Giacomo Caraglio, showing Mercury ( mythology ) | Mercury, Herse, and Aglaulus, daughter of Cecrops | Aglaulos

* December 5 – Gian Giacomo Trivulzio, military commander ( b. c. 1440 )

* In the right transept, the monument to Gian Giacomo Medici di Marignano, called " Medeghino ", by Leone Leoni, and the adjacent Renaissance marble altar, decorated with gilt bronze statues.

The first group, a troop of about 2, 500, was led by Gian Giacomo Trivulzio.

In the early 16th century it was briefly ruled by the condottiere Gian Giacomo Medici.

* 2009 — Matteo Basilé, Manfredi Beninati, Valerio Berruti, Bertozzi & Casoni, Nicola Bolla, Sandro Chia, Marco Cingolani, Giacomo Costa, Aron Demetz, Roberto Floreani, Daniele Galliano, Marco Lodola, MASBEDO, Gian Marco Montesano, Davide Nido, Luca Pignatelli, Elisa Sighicelli, Sissi, Nicola Verlato e Silvio Wolf

The most renowned condottieri fought for foreign powers: Gian Giacomo Trivulzio abandoned Milan for France, while Andrea Doria was Admiral of the Holy Roman Emperor Charles V. In the end, failure was political, rather than military, stemming from disunity and political indecision, and, by 1550, the military service condotta had disappeared, while the term condottiere remained current, denominating the great Italian generals ( mainly ) fighting for foreign states ; men such as Gian Giacomo Medici, Ambrogio Spinola, Marcantonio II Colonna and Raimondo Montecuccoli were prominent into the sixteenth and the seventeenth centuries.

* Gian Giacomo Trivulzio ( c. 1441-1518 )

* Gian Giacomo ( 1447 – 53 )

* The Castle of Charles V was built in 1539-49 by Gian Giacomo dell ' Acaja.

Gian Giacomo Medici, Il Medeghino, in a 16th-century engraving

Gian Giacomo Medici ( 25 January 1498 – 8 November 1555 ) was an Italian condottiero, Duke of Marignano and Marquess of Musso and Lecco in Lombardy.

Gian Giacomo Medici was the brother of Giovanni Angelo Medici, who was later to be elected Pope as Pius IV.

Gian Giacomo, the eldest of fourteen children, was banished from Milan after a daring murder of revenge in broad daylight.

In the main church of Cima, which belongs to the community of Porlezza, an inconspicuous relief shows the lion of San Marco, a symbol of the alliance between Gian Giacomo de Medici and the former Republic of Venice.

It is likely that Gian Giacomo even had a residence in Cima, on the same spot where now stands a hotel, probably not called by chance Parco San Marco.

The great engineer Agostino Ramelli trained with Gian Giacomo, who instructed him in mathematics and architecture.

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Mirandola fell in January 1511, the pope having taken personal command of the assault ; but d ' Amboise had been replaced by Gian Giacomo Trivulzio, who took back Concordia and Castelfranco, while the Papal army retreated to Casalecchio.

A combined Swiss and Papal force moved north from Milan to block the Alpine passes against him, but Francis, following the advice of Gian Giacomo Trivulzio, avoided the main passes and marched instead through the valley of the Stura.

Marshal Gian Giacomo Trivulzio, veteran of every war for the previous forty years, praised Marignano as the “ battle of giants ” and stated that compared to it, all previous battles in his lifetime had been “ child ’ s sport ”.

Gian Giacomo Trivulzio.

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Ludovico Sforza, having hired an army of Swiss mercenaries, returned to the city to find it occupied by Gian Giacomo Trivulzio, who had joined the French ; Ludovico's army was soon scattered, and he himself imprisoned in France.

Alessandro Algardi ( 31 July 1598 – 10 June 1654 ) was an Italian high-Baroque sculptor active almost exclusively in Rome, where for the latter decades of his life, he was the major rival of Gian Lorenzo Bernini.

* 1761 – Gian Domenico Romagnosi, Italian physicist ( d. 1835 )

Francesco Borromini, byname of Francesco Castelli ( 25 September 1599 – 3 August 1667 ), was an architect from Ticino who, with his contemporaries Gian Lorenzo Bernini and Pietro da Cortona, was a leading figure in the emergence of Roman Baroque architecture.

* 1720 – Gian Francesco Albani, Italian Catholic cardinal ( d. 1803 )

* 1380 – Gian Francesco Poggio Bracciolini, Italian humanist ( d. 1459 )

Gian Lorenzo Bernini ( also spelled Gianlorenzo or Giovanni Lorenzo ) ( Naples, 7 December 1598 – Rome, 28 November 1680 ) was an Italian artist who worked principally in Rome.

* 1911 – Gian Carlo Menotti, Italian composer ( d. 2007 )

* 1835 – Gian Domenico Romagnosi, Italian physicist ( b. 1761 )

* 1882 – Gian Francesco Malipiero, Italian composer ( d. 1973 )

* 1981 – Gian Magdangal, Filipino singer and actor

* Gian Galeazzo 1476 – 1494

**** son Gian Galeazzo ( 1469 – 1494 ), married Isabella of Naples

* Gian Lorenzo Bernini –

There would be a flamboyant Mexican bandit ( Gian Maria Volonté from A Fistful of Dollars, otherwise Tomas Milian or most often Fernando Sancho ) and a grumpy old man – more often than not an undertaker, to serve as sidekick for the hero.

* March 18 – Gian Francesco Malipiero, Italian composer ( d. 1973 )

* November 18 – Gian Magdangal, Filipino singer and actor

* June 26 – Battle of Casalecchio: Gian Galeazzo Visconti, the Duke of Milan, crushes the forces of Bologna and Florence, but he dies from a fever later this year and is succeeded by his son Gian Maria Visconti.

* September 3 – Gian Galeazzo Visconti, first Duke of Milan ( b. 1351 )

* December 7 – Gian Lorenzo Bernini, Italian sculptor ( d. 1680 )

* December 26 – Gian Francesco Albani, Italian Catholic cardinal ( d. 1803 )

* October 2 – Caterina Visconti marries her first cousin, Gian Galeazzo Visconti, later Duke of Milan, at the Church of San Giovanni in Conca.

* February 11 – Gian Francesco Poggio Bracciolini, Italian humanist ( d. 1459 )

* February 10 – Christina, former Queen of Sweden, has Gian Rinaldo Monaldeschi killed in her presence at the Palace of Fontainebleau.

* June 20 – Gian Galeazzo Sforza, Duke of Milan ( d. 1494 )