The Last Supper by Leonardo da Vinci
The mural on the back wall of the dining hall of the Dominican convent of Santa Maria delle Grazie in Milan, Italy, was painted from 1495 to 1498. It differed from other frescoes of the era in that da Vinci created it by using experimental pigments directly on the dry plaster wall. But even before it was finished, it suffered from paint flaking off the wall. Da Vinci repaired the damage but it continued to crumble and was inadvertently damaged over the years both by the effects of time and unfortunate events such as Napoleon’s troops using the wall for target practice and the 1943 bombing which destroyed the room’s roof and exposed the fresco to the weather elements. Not much of the original painting survived and what can be seen today are mainly repairs.