Has anyone ever tried to destroy the mona Lisa?

Answer 1

In 1505, posing as a human known as Captain Tancredi, Scaroth of the Jagaroth commissioned da Vinci to paint at least six copies of the Mona Lisa. (DW: City of Death) Da Vinci had to borrow oil paint from Giuseppe di Cattivo, his neighbour, to finish the paintings, but this paint was in fact part of a sentient meteorite that di Cattivo had recovered. (SJA: Mona Lisa's Revenge) While the Fourth Doctor did not destroy the six "forgeries" (if, in fact, they could be considered forgeries, since they were all painted by da Vinci), he did ensure that future X-ray machines would be able to discover their provenance by writing "THIS IS A FAKE" on the blank boards each of the fakes would be painted on, and leaving a note in mirrored writing for da Vinci apologising for the state of the canvases and telling him to just paint over the words.

The six "fakes" were sealed away in a secret cellar room inside a house in Paris until 1979. At some point, the "original" of the seven paintings came to hang in the Louvre gallery, also in Paris.

In 1979, Scaroth, posing as Count Scarlioni, stole the one known copy from the Louvre, intending to sell all seven in an attempt to raise money to fund his time travel research. Before they could be sold off, a fire destroyed all but one of the "fakes". It was this Mona Lisa that was returned to the Louvre.