La Jaconde

On the subject of Napoleon and Josephine's boudoir, once Napoleon became First Counsol, he and Josephine moved to the Tuileries palace. Josephine did not like their lodgings, first of all because she felt haunted by the spirit of Marie Antoinette, and second of all, because she objected to Napoleon's sense of interior decoration.

That is to say, Napoleon had hung the Mona Lisa in their bedroom and Josephine got extremely jealous of the painting and had him move it- first to his bathroom and then to the Louvre, where it hangs to this day, amid all the other bits of cultural patrimony Napoleon took from other parts of Europe and neglected to give back once he was deposed.