Leonardo da Vinci's Last Supper Florentine plaque, 57 x 30". The original was worked on from 1495- 1498 and is housed in the Convent of Santa Maria delle Grazia in Milan, Italy. Leonardo's Last Supper has undergone many resorations startinag as early as 1726. The last restoration started in 1979 and was completed in 1999. Made in Italy.