Ralph and Ruth Morse, 1947. Lascaux caves, France.

On September 12, 1940, the entrance to the Lascaux Cave in the Dordogne, Southern France was discovered by 18 year old Marcel Ravidat and his three friends,  Jacques Marsal, Georges Agnel, and Simon Coencas,  The teenagers accidentally came across the entrance to the cave and when entering, discovered that the cave walls were covered with incredible depictions of animals. Galleries that suggest continuity, context or simply represent a cavern were given names. Those include the Hall of the Bulls, the Passageway, the Shaft, the Nave, the Apse, and the Chamber of Felines. The paintings are thought to be around an astonishing 15,000 - 17,000 years old.  The first professional photographs taken of the cave paintings at Lascaux were by Ralph and Ruth Morse for LIFE Magazine in 1947.  These cave paintings were the inspiration for the production of the Fat Lava 'Montignac' vases by Scheurich, West Germany.  http://www.history.com/this-day-in-history/lascaux-cave-paintings-discovered