Milan is offering the public a rare glimpse of a long-hidden Leonardo da Vinci mural as part of a limited-time viewing during restoration efforts at the historic Sforza Castle. The large-scale work, partially concealed for centuries, is accessible only briefly while experts continue preserving the fragile painting.
The Leonardo mural, located in the Sala delle Asse within the castle, depicts a pergola intertwined with flowering branches and stretches across the ceiling and part of the walls. Leonardo began the work in the late 15th century but never completed it.
Historical documents confirm he abandoned the project in 1498 when French forces entered Milan, forcing him to leave. Soon after, the artwork was covered and forgotten.
The site sits inside Sempione Park, where the Olympic flame will burn during the 2026 Winter Games from February 6 to 22. Officials also announced that the design of the Olympic cauldron takes inspiration from Leonardo’s geometric studies, further highlighting his lasting influence on Milan’s cultural identity.
Leonardo’s mural disappeared and resurfaced in Milan
Following the French occupation, Sforza Castle became a military barracks, and the mural was sealed under layers of plaster. It remained hidden until the early 20th century, when restorers uncovered it and attempted to match Leonardo’s style with added color.
Flavia Pesaresi works on restoring the Sala delle Asse, part of the newly created Leonardo da Vinci itineraries inside Milan’s Sforza Castle, Italy. pic.twitter.com/flb0v1S0nD
— Tom Marvolo Riddle (@tom_riddle2025) January 21, 2026
Over time, scholars grew skeptical of the painting’s authenticity due to the visible alterations, with some describing it as more of a replica than an original.
From February 7 to March 14, visitors can climb scaffolding inside the hall to observe restoration work in progress. After this short window, the room will close again for 18 months to complete the conservation.
Luca Tosi, heritage curator at the site, explained that the restoration process is delicate. The original painting has sections where the surface is lifting and areas that are especially fragile. Conservators must work inch by inch, using Japanese rice paper and demineralized water to gently remove salt buildup without harming the artwork.
Leonardo’s scientific vision reflected in the mural
Tommaso Sacchi, Milan’s top cultural official, described the mural as a detailed botanical study that reflects Leonardo’s deep scientific interests.
He said seeing this aspect of the artist offers a rare insight into his dedication to both art and knowledge.
This limited viewing marks a significant opportunity to reconnect with a lesser-known chapter of Leonardo’s legacy in Milan.
