The theft of the Mona Lisa in 1911 was a significant event because it catapulted the painting and its artist, Leonardo da Vinci, to international fame. The news of the theft created a media sensation and brought attention not only to the painting itself but also to the field of art theft and security. The painting was recovered in 1913, which further increased its popularity and cemented its status as one of the most famous artworks in the world. Overall, the theft of the Mona Lisa in 1911 contributed to its iconic status and enduring legacy in the art world.