When Leonardo da Vinci arrived in Milan, the Fabbrica del Duomo was already aflutter. So, between the Last Supper of Santa Maria delle Grazie, the numerous works for the court of the Sforza and his beloved scientific studies, the genius of the Renaissance was able to make a significant contribution to the birth of the city’s future icon. At the time, the tiburio or lantern project of the structure was underway, the external structure enclosing the dome of the church, involving great artists such as Donato Bramante, Luca Fancelli and Francesco di Giorgio Martini. 500 years after the death of the artist and inventor from Tuscany, an exhibition narrates his work on the building of Milan’s Cathedral, exploring a crucial moment in the construction of the monument. Manuscripts, books, drawings and other works belonging to the Veneranda Fabbrica del Duomo step out of the shadows in an itinerary divided into five sections. From the 1400s to the modern day, the history of the extraordinary gothic building and of the city’s historic centre are explored in an immersive reconstruction. A multimedia project created in collaboration with the Politecnico of Milan analyses several fogli of the Atlantic Codex, shedding light on Leonardo’s proposal for the tiburio.