Marie Sophie, last Queen of The Two Sicilies on horseback, flanked by her sisters-in-law, on the left Marie Immaculata, on the right Marie Annunziata.
A cdv by Fratelli D'Alessandri, Rome circa 1861.
en.wikipedia.org/wiki/Maria_Sophie_of_Bavaria
en.wikipedia.org/wiki/Princess_Maria_Immacolata_of_Bourbo...
en.wikipedia.org/wiki/Princess_Maria_Annunciata_of_Bourbo...