Indian history hasn't been well researched because of various reasons. However, recent efforts are pushing back continuous settlement dates by multi-thousand of years. For instance: Varanasi is in above wiki link with 1200 BC as inhabited since. However [0] pushes it back to at least 4500 BC.
>>> The results that have come from a detailed geo-exploration (exploration conducted through GPS technology) conducted by seven IIT-Kgp departments, tracing the different stages through which civilization progressed, and how Varanasi has been able to maintain continuity as a living civilization, unlike comparable seats of human settlement in the world. The researchers have dug 100-metre-deep boring holes all over Varanasi to conclude that there is evidence of continuous settlement at least till 2000BC. There are enough indications that by the time the data collection is over, there would be enough to prove that this date can be pushed back to about 4500BC.The oldest part of this civilisation has been traced to the Gomati Sangam area of Varanasi, as indicated by the underground layers that have already been tested.
0: https://timesofindia.indiatimes.com/city/kolkata/Varanasi-is...
>>> The results that have come from a detailed geo-exploration (exploration conducted through GPS technology) conducted by seven IIT-Kgp departments, tracing the different stages through which civilization progressed, and how Varanasi has been able to maintain continuity as a living civilization, unlike comparable seats of human settlement in the world. The researchers have dug 100-metre-deep boring holes all over Varanasi to conclude that there is evidence of continuous settlement at least till 2000BC. There are enough indications that by the time the data collection is over, there would be enough to prove that this date can be pushed back to about 4500BC.The oldest part of this civilisation has been traced to the Gomati Sangam area of Varanasi, as indicated by the underground layers that have already been tested.