[citation needed] The capital of Tanwar changed a few times during the course of 457 years they ruled in the northern India.

Discovered in 1986, - Mangar Bani near Delhi may extend AGPS, dating back to the **Mesolithic and Paleolithic eras.

[10] From a study of the prehistoric findings along the ridges of Surajkund reservoir, Anagpur Dam, and around Delhi and adjoining parts of Haryana, it has been inferred that the southern hilly area of Delhi and Haryana was environmentally suited for pre-historic man to settle here.

[11] These were found at 43 sites from Ankhir (a village 17 km east of Mangar Bani) in south to north along the Anangpur-Angnpur Dam-Surajkund-Tughlaqabad axis.

[9] One of these sites is at Kot village, northeast of Sohna and southwest of Dhauj, where prehistoric paintings on stones and tools, such as chisel, have been found.

As of 31 July 2021, Head of HAD, Ashok Khemka, informed that proposal to notify this entire area as protected archaeological site has been sent by Haryana Archaeological Dept (HAD) to Govt of Haryana (GoH), and HAD is awaiting gazette notification by the GoH after which this site will become legally protected.

[9] Khemka asserted that HAD will engage National Research Laboratory for Conservation of Cultural Property (NRLC) Lucknow, Birbal Sahni Institute of Palaeosciences (BSIP) Lucknow, Physical Research Laboratory (PRL) Ahmedabad for conservation of rockart and paintings.

Anangpur Dam is an Indian hydraulic engineering structure built during his reign and the ruins of a fortification can also be seen around it.

Surajkund, a large masonry tank, can be found in this area dating from the 9th century and was used to collect water from the Anangpur Dam and the surrounding areal.