In primeval times, people from all over the globe were eager to come to India. Initially, the Aryans came from Central Europe and settled down in India. Later, the Persians followed by the Iranians immigrated to India. Then came the Mughals and they too settled down permanently in India. Changes Khan, the Mongolian, invaded and plundered India many times. Alexander the Great too, came to conquer India but went back after a battle with Porus. He-en Tsang came from China in pursuit of knowledge and visited the ancient Indian universities of Nalanda and Takshila. Columbus was willing to come to India, but instead landed on the shores of America. Vasco-da-Gama from Portugal came to trade his country's goods in barter for Indian species. Also, the French came and established their colonies in India.