c. 1474 (150 Kb); Oil on wood, 38.2 x 36.7 cm (15 1/8 x 14 1/2 in); National Gallery of Art, Washington, DC

1483-90 (150 Kb); Oil on wood, 53.4 x 39.3 cm (21 x 15 1/2 in); Czartoryski Museum, Cracow

1481-82 (200 Kb); Yellow ochre and brown ink on panel, 246 x 243 cm (8 x 8 ft); Uffizi, Florence

c. 1490-91 (150 Kb); Tempera on canvas, transferred from panel, 42 x 33 cm (16 1/2 x 13 in); Hermitage, St. Petersburg

Portrait of Mona Lisa (1479-1528),

This figure of a woman, dressed in the Florentine fashion of her day and seated in a visionary, mountainous landscape, is a remarkable instance of Leonardo's sfumato technique of soft, heavily shaded modeling. The Mona Lisa's enigmatic expression, which seems both alluring and aloof, has given the portrait universal fame.

[source:ebeijing.gov.cn]