Diego Velázquez. The Ladies in Waiting (‘Las meninas’), 1656 (Museo Nacional del Prado, Madrid).

Oil on canvas: 320.5 x 281.5 cm(!). The young Infanta Margarita Teresa surrounded by her entourage.

Visit > Museo Nacional del Prado, Madrid.
More > Diego Velázquez at Wikipedia.
More > 'Las meninas' at Wikipedia.