King Atlas is considered the most famous monarch of Mauretania(MOROCCO) throughout history, having ruled around 1000 BC. He left his name in every place associated with him, such as the Atlas Mountains and the Atlantic Ocean, and the Moorish people over whom he reigned, who were called the "Atlantians" or "Atlanteans."In his book Critias, Plato states that Atlas is the name of the King of Atlantis, and after him, the Atlantic Ocean and the mountain range of the Kingdom of Mauretania were named. However, Atlas was the human son of Poseidon, and many other sources confirm that he was an expert in astronomy as well as the King of the Kingdom of Mauretania.The Greek historian Diodorus Siculus (who lived in the 1st century AD) said of Atlas, King of Mauretania: "He was the first person to master geography and astronomy, and the first to present a spherical model of the Earth." In 1589, the geographer and cartographer Gerardus Mercator published his famous book of maps, because he considered the Moorish King Atlas of Mauretania (Morocco) to be the greatest geographer, a veteran philosopher, and an astronomer and mathematician. His biography occupied the first page of this book, which commemorates the name of this king who ruled the Kingdom of Mauretania since approximately the 10th century BC.The Moroccan historian Abdelhak El Merini mentions in his book The Moroccan Army that historians who have written about the ancient history of Morocco almost agree that successive nations all aspired to seize the lands of the Maghreb (Morocco), only to clash with fierce resistance. Its people were famous before the birth of Christ for their strength and intensity; among these accounts is that the Moroccan King "Atlas" contemplated, a thousand years before the birth of Christ, the invasion of the lands of cold and demons (Europe).