Prehistory Neolithic rock art at the Laas Geel complex depicting a long-horned cow. Somalia has been inhabited since at least the Paleolithic. During the Stone Age, the Doian and Hargeisan cultures flourished here. Each painting has an inscription below it, which collectively have been estimated to be around 2, years old. Ancient pyramidical structures, mausoleums , ruined cities and stone walls, such as the Wargaade Wall , are evidence of an old civilization that once thrived in the Somali peninsula. They were reputed for their longevity and wealth, and were said to be the “tallest and handsomest of all men”. According to Herodotus’ account, the Persian Emperor Cambyses II , upon his conquest of Egypt BC , sent ambassadors to Macrobia, bringing luxury gifts for the Macrobian king to entice his submission.