This photo’s neat for obvious reasons but also because it was taken right around the time that the opera Aida had its world premiere in Cairo. In 1869, at the request of the Khedive, Auguste Mariette (seated far left) wrote a brief plot for an opera which was set in ancient Egypt. The following year this concept, worked into a scenario by librettist Camille du Locle, was proposed to Giuseppe Verdi, who accepted it as a subject for Aida. Aida premiered December 24, 1871 at the Khedivial Opera House and was attended by dignitaries, politicians, and critics.
photo (click to view larger) via wikipedia