 Apollinaire implicated his friend Picasso, who was also brought in for questioning in the theft of the "Mona Lisa", but he was also exonerated.The theft of the "Mona Lisa" was perpetrated by Vincenzo Peruggia, an Italian house painter who acted alone and was only caught two years later when he tried to sell the painting in Florence.Apollinaire wrote the preface for the first Cubist exposition outside of Paris; "VIII Salon des Indépendants", Brussels, 1911.