Painted cows, neolithic rock art at Tin Meskis, Adrar n'Ahnet, Algeria, Sahara, North Africa

adrar africa african african aged algeria algerian art at carving carvings colored coloured cow cows drawing engraving engravings historic historical historically history inboard indoor indoors inside interior internal meskis mural murals nahnet neolithic north of old painted painted painting paintings petroglyph petroglyphs petrograph petrographs photo pictogram pictogramme pictogrammes pictograms pictograph pictographs rock sahara tin wall work works