Tell me about the catastrophe of the last dinner calendar with a history of more than 500 years.

For hundreds of years, leonardo da vinci's masterpiece The Last Supper has experienced many disasters.

For example, in the Napoleonic era, the army used this dining room as a place to pile up horse materials. During World War II, the roof and wall on the right side of the mural were blown up. What's more, some people tinkered with it several times. Since18th century, they have been restored six times, most of which are based on the original paintings. By the middle of the 20th century, this "Last Supper" had become a remnant of fading, peeling and dyeing. But from 1980, the peeling phenomenon of this mural stopped, and then it became a slow, almost miraculous new process. The work of restoring the true colors of murals by scientific methods has begun, and the whole work is led by the art director of Lombardy District. Experts first looked at the murals very carefully, and then began to repair very small pieces one by one.