Leonardo da Vinci's famous 15th-century work, "The Last Supper" (or “Il Cenacolo ... but because of the technique da Vinci used (dry wall-painting), it continues to deteriorate.

From Dec. 2, the Grande Brera also incorporated into its fold Leonardo da Vinci’s “Last Supper,” arguably Italy’s most famous masterpiece. The fragile wall mural is located in a church ...