Indus Valley Civilisation

The Indus Valley Civilisation (3300-1300 BC) was one of the world's earliest and most sophisticated urban cultures, with cities like Mohenjo-daro and Harappa featuring standardised baked brick, grid-plan streets, covered drains, sophisticated sanitation, and public baths — urban planning that would not be seen again in Europe for 3,000 years. Its undeciphered script remains one of archaeology's great mysteries.