Fernando Botero (1932), Study after "Mona Lisa" by Léonard de Vinci, c. 1950, pencil on paper, signed in pencil, 27,5x21 cm  Study linked to: Fernando Botero (1932), "Monalisa", 1977, oil on canvas, 183x166 cm - This work is housed in the Botero Museum collection in Bogota, Lucienne Pasquier Collection, provenance directly from the artist