Herman Mishkin (1871–1948) was the official photographer of the Metropolitan Opera from 1910 to 1932. The Herman Mishkin Photograph Collection includes glass photographic negatives capturing portraits of several Metropolitan Opera singers of the late nineteenth and early twentieth centuries. Singers represented include Maria Duchène, Manuel Salazar, Leonora Sparkes, Madame Zerola, Nicola Zerola, and Adeline Vosari.