Martín Chambi Self Portrait in the Temple of Three Windows, Machu Picchu Peru (c. 1930) Gelatin silver bromide [Source]

Wikipedia says:

Martín Chambi Jiménez or Martín Chambi de Coaza, (Puno, Peru November 5, 1891 – Cuzco, September 13, 1973) was a photographer, originally from southern Peru. He was one of the first major indigenous Latin American photographers.
Recognized for the profound historic and ethnic documentary value of his photographs, he was a prolific portrait photographer in the towns and countryside of the Peruvian Andes. As well as being the leading portrait photographer in Cuzco, Chambi made many landscape photographs, which he sold mainly in the form of postcards, a format he pioneered in Peru.
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