Sentence:  On Sunday 13 June the <WSD>electress</WSD> attended mass at the Santo and visited the relics of the saint, on which occasion Guadagni sang, as usual, Vallotti's antiphon 'O linque benedicta'; in the evening she was entertained at an "accademia di musica" in the Giustinian palalace, where Guadagni is numbered among the performers; the following evening she heard him again in a performance of her own short opera, "Il trionfo della fedeltà" (first performed in Dresden, 1754) at the Palazzo Dondi Orologio. 
Meaning of the word marked with <WSD> tags:  The wife of a German elector, often used as a title. (from 17th c.)