What happened 1482 AD

In 1482, Leonardo casted a silver stringed instrument from a horse's skull and ram horns to bring to Sforza (Duke of Milan Ludovico Sforza), whom he wrote a letter describing the diverse things that he could achieve in the fields of engineering and weapon design, and mentioning that he could paint.

Leonardo worked in Milan from 1482 until 1499. He was commissioned to paint the Virgin of the Rocks for the Confraternity of the Immaculate Conception and The Last Supper for the monastery of Santa Maria delle Grazie.

In a letter of 1482 to the lord of Milan Ludovico il Moro (Ludovico Sforza), Leonardo wrote that he could create all sorts of machines both for the protection of a city and for siege. When he fled from Milan to Venice in 1499, he found employment as an engineer and devised a system of moveable barricades to protect the city from attack.