Maria Carolina was born Archduchess of Austria, daughter of Empress Maria Theresia. Her Wikipedia article is here.

Maria Carolina of Austria, Queen of Naples and Sicily by Francesco Liani (Museo di Capodimonte - Napoli, Campania, Italy)

María Carolina de Habsburgo-Lorena, reina de Nápoles by ? (Museo Nacional del Prado - Madrid, Spain)

ca. 1768 Maria Carolina of Austria by Francesco Liani (Zamek Królewski w Warszawie - Warsawa, Poland)

1770 Maria Carolina of Austria as Queen of Naples by Francesco Liani (Museo Campano - Capua, Campagnia, Italy)

1768 María Carolina de Habsburgo-Lorena, reina de Nápoles by Anton Rafael Mengs (Museo Nacional del Prado - Madrid, Spain)

1768 María Carolina de Habsburgo-Lorena, reina de Nápoles by Anton Rafael Mengs (Museo Nacional del Prado - Madrid, Spain) bertha, stomacher, gloves, fan, and bows

1768 María Carolina de Habsburgo-Lorena, reina de Nápoles by Anton Rafael Mengs (Museo Nacional del Prado - Madrid, Spain) headdress and necklace

1772 or 1773 Maria Carolina of Austria and her daughter María Teresa by Giuseppe Bonito (Museum Cerralbo - Madrid, Spain)

Presumed Portrait of Maria Carolina of Austria - attributed to Francesco Liani (Artmediacom Gao's Gallery - by appointment - Avignon, Provence-Alpes-Côte d'Azur, France)

Queen Maria Carolina and her children overlooking Naples by Queen Maria Carolina of Austria (location unknown to gogm)

1782-1783 Maria Carolina of Austria by Angelika Kauffman (Vorarlberger Landesmuseum - Bregenz, Voralberg Austria)

1783 Queen Maria Carolina of Naples and Sicily and King Ferdinand I with their children by Angelica Kauffman (Liechtenstein Museum - Wien, Austria)

1783 Queen Maria Carolina of Naples and Sicily and King Ferdinand I with their children by Angelica Kauffman (National Museum of Capodimonte - Napoli Italy)

1785 Maria Carolina of Augsburg (Ferdinand IV' s wife and Mary Antonietta of France's sister), Queen of Naples by Francesco Saverio Candido (Palazzo Reale di Napol - Napoli, Campania, Italy)

Maria Carolina d'Austria by Johann Heinrich Tischbein (Reggia di Caserta - Caserta, Campagnia, Italy)

ca. 1790 Maria Carolina, Queen of Naples by Nicolas-François Dun (R. D. Brewster Collection of Portrait Miniatures)

ca. 1795 Marie Karoline von Habsburg, Königin von Neapel by Joseph Kreutzinger (Tansey Miniatures Foundation collection, Bomann-Museum - Celle, Niedersachsen, Germany)
