 It is also featured in the "Epic of Gilgamesh".However, in the early epic ""Enmerkar and the Lord of Aratta"", the main events, which center on Enmerkar's construction of the ziggurats in Uruk and Eridu, are described as taking place in a world "before Dilmun had yet been settled".The immigration of South Asians to Bahrain started in the late quarter of the 19th century and today Pakistanis, Bangladeshis, and Indians combined form the largest expatriate groups in Bahrain.