Krishnagiri district has prehistoric importance Archaeological sources confirm the presence of habitats of mankind during paleolithic, neolithic and mesolithic ages. Various rock paintings and rock carvings of Indus valley civilization and iron age seen in this district support the historical significance of this district. The heart of krishnagiri Hosur and uthangarai were known Eyil Nadu 'Murasu Nadu' Koovoor Nadu respectively. During chola period krishnagiri region was called 'Nigarili chola mandalam and vidhugadhazhagi nallur. under nulamba rule it was popular as Nulambadi according to historical sources . Hero stones were erected for those whose lost their lives in pursuit of adventure.
There was a tradition of erecting memorial stones for people who sacrificed their lives for the sake of the kings since sangam age. These memorial stones were called Navagandam. This district was bifurcated from Dharmapuri district on 09-02-2004. Krishnagiri is also a historical place. this place with huge boulders of stupendous size making the walls, reveal its glorious past. An old fort called syed padsha hill fort is famous and attracts many tourists apart from the reservoir.
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