Portrait of the opera singer Louise Théo in costume.
 Albumen print, business card format
 Louise Théo (1850-1922) was quickly noticed by Offenbach. In 1873, she made her operetta debut while continuing her music hall career. Ten years later, she toured internationally, in the United States and Canada, where she enjoyed great success.
 Gaston & Mathieu, photographers based on Boulevard Bonne Nouvelle in Paris, are known for their numerous photographs of actresses and the world of entertainment.