Some scholars have suggested that Leonardo alludes to the halo through the shining light from the window behind Jesus, or the pediment above the window.
In northern Italian dialect, the word for herring is "renga," which also describes someone who denies religion.
It includes several lost details such as Christ's feet and the salt cellar spilled by Judas.
Restoration started around 1726 and continued until well into the 20th century.
Retrieved 21 December 2012.
Within 50 years, it was barely in any state that resembled its former grandeur.