Milan is a city in northern Italy, regional capital of Lombardy, and the second-most-populous city proper in Italy after Rome. The city proper has a population of about 1.4 million, while its metropolitan city has 3.22 million residents. The urban area of Milan is the fourth largest in the EU with 5.27 million inhabitants. According to national sources, the population within the wider Milan metropolitan area is estimated between 4.9 million and 7.4 million, making it by far the largest metropolitan area in Italy and one of the largest in the EU. Milan is the economic capital of Italy, one of the economic capitals of Europe and a global financial centre.

Leonardo di ser Piero da Vinci was an Italian polymath of the High Renaissance who was active as a painter, draughtsman, engineer, scientist, theorist, sculptor, and architect. While his fame initially rested on his achievements as a painter, he has also become known for his notebooks, in which he made drawings and notes on a variety of subjects, including anatomy, astronomy, botany, cartography, painting, and paleontology. Leonardo is widely regarded to have been a genius who epitomized the Renaissance humanist ideal, and his collective works comprise a contribution to later generations of artists matched only by that of his younger contemporary Michelangelo.