Discovered in 1954, Lothal is an important archaeological find not only for its own antiquity and advanced civilization but also because it is a vital key to understanding the full story of the ancient Indus Civilization. The excavations at Lothal throw light on a large number of hitherto unexplained points and refute the earlier arguments that the destruction of Harappan cities was primarily due to Aryan invasion. With its unique dockyard and well-developed industries, Lothal played an important role in the Indo-Sumerian trade of the Bronze Age.