Soprano Sophie Karthäuser has been called a born Mozartian, but she attained that status through training and experience, not birth. With some exceptions, Mozart and Haydn are at the chronological tail end of her repertoire, and she has been ideally situated as historical-instrument ensembles and conductors have moved into Classical-era repertory and beyond. Karthäuser found herself in demand from such conductors as William Christie, René Jacobs, and Emmanuelle Haïm. She made her recording debut in 2003 on a recording of music by André Modest Grétry with the early music ensemble Les Agrémens. In 2022, she was heard with Les Arts Florissants on a recording of Vivaldi's hypothetical Great Venetian Mass.