The palm tree in the background suggests this portrait is not set in Austria.
From Wikipedia.
Leopoldina wears a dressier dress than in the last image, but it is white, broad at the base that could allow better ventilation, has a vee neckline, and short sleeves - and it's pretty.
Keywords: Schlappriz, Maria Leopoldine of Austria-Brazil, Habsburg family, Bragança family, Archduchess, Empress, curly coiffure, tiara, vee neckline, neckline ruff, quarter length puffed sleeves, ruffles, waist band, bows, Empire waistline, full skirt, necklace