Sala delle Asse

The Sala delle Asse (In English: 'room of the wooden planks'), is a large room in the Castello Sforzesco in Milan, the location of a painting in tempera on plaster by Leonardo da Vinci, dating from about 1498. Its walls and vaulted ceiling are decorated with "intertwining plants with fruits and monochromes of roots and rocks" and a canopy created by sixteen trees.

The walls and ceiling are painted with a trompe-l'œil scheme depicting trunks, leaves, fruits, and knots, as if it was in the open air and not within a castle. Art historian Rocky Ruggiero describes the decoration of the square, fifteen-by-fifteen-meters room as creating the effect of a natural pergola as an architectural feature. Ruggiero suggests that Leonardo drew upon all of his scientific research into natural systems as he painted the masterful illusion that resembles a grove of mulberry trees.