Is this the one?

1659, Portrait of the Little Princess Margaret, Eight Years Old (Infanta?Margareta), oil on canvas, 127 cm x 107 cm, 17th century, Spanish Madrid court painter Diego de Silvay?Velazquez (Diego?Rodriguez?de?Silvay?Velazquez. 1599-1660) painted. Collection of the Kunsthistorisches Museum, Vienna, Austria. This is a famous painting painted for a blind date with the young Princess Margaret, daughter of King Philip IV of Spain.?　　

Portrait of the Little Princess Margarita at the Age of Eight Description:?　　Little Princess Margaret was five years old when she was the main character in the painting "The Courtesan", in this painting she is eight years old. Three years of time, so that Margaret was originally carefree innocent demeanor, but turned to exude a mature and dignified atmosphere, and there is an additional melancholy temperament on her face. Draped in blonde hair and dressed in a blue-tinted gown with a green hair bow, the little princess is painted with leather gloves, textiles, long dress ruffles, and trimmings that all help to enhance the overall effect of the little princess. The delicate, blown-out skin of the little princess is also a masterpiece of careful carving by the Guichan branch of Velas...?　　

Like all of Velázquez's royal portraits, this painting is y personalized in its expressions, and the local depictions are subtle and ornate, showing us the nobleman's graceful and elegant gestures.