 These are sometimes called early rescue operas, or conversely predecessors of the rescue opera.Henri Montan Berton's "Les rigueurs du cloître" (1790) has been described as the first rescue opera; Luigi Cherubini's "Lodoïska" (1791) has also been named a founding work of the genre.Other examples from the end of the eighteenth and beginning of the nineteenth century, the period when rescue opera flourished, are Nicolas Dalayrac's "Camille ou Le souterrain" (1791), Jean-François Le Sueur's "La caverne" (1793), and Cherubini's "Les deux journées" (1800).