The discovery of Indus Valley Civilization by 2500 BC, the evidences of Harappan Civilisation were obtained, because Harappan site was first to be discovered in 1921 at the modern site of Harappa situated in the province of west in Punjab in Pakistan. Due to the bronze things of that time, it is also called the Bronze Age Civilisation. Such knowledge and skills enabled people to advance to a new stage in the progress of civilisation.