In the 1950s, archaeologists found a crown of balls, 4,000 silex, mammal's teeth and bones of animals laid out near a dried up watering hole which is some 40,000 years old. Testimony of devotion with regard to a spirit of the waters, source of any life, and ruins which may constitute the oldest religious "building" known in the world (Hermaïon of El Guettar).[citation needed]