François de Troy - So-called portrait of Teresa Kunegunda Sobieska - Lviv National Art Gallery

So-called Portrait of Theresa Kunegunda Sobieska, Electress of Bavaria (1676-1730), but is probably a depiction of Louise Élisabeth d'Orléans, Queen of Spain (1709-1742)
Identification made by Guillaume Attlane (altesses.eu) based on the presence of a mantle with the fleur-de-lis, symbol of French royalty, and the comparison with a portrait of the Queen of Spain by Jean Ranc.