Every city has a tale to tell but here once was a kingdom and now is lost in ruins and all the tales are lost in these stones.
This region remained untouched in their isolated mountain fastness. Walled off from the outside world by chains of wooded hills.The long immunity from hostile disturbance enabled the tribes to build up their own social and administrative organizations and by 5th Century AD they had their first Nagvanshi Raja.
The Mughal invasion had started in Indian subcontinent in the year 715 AD but it took a long time for them to reach the state of Jharkhand. The Chotanagpur plateau was referred to as ‘Jharkhand’ during the Turko-Afgan period (upto 1526) till then it was free from any external influence and was addressed as ‘Kokhra’ and it was the ruling king’s head quarter. It is only with the accession of Akbar to the throne of Delhi in 1556 that Muslims influence penetrated Jharkhand.
Another reason behind the invasion was the acquisition of the diamonds found in the bed of the river Sankh in the region. Due to its diamonds Chotanagpur was also known as ‘Heera Nagpur’ and its Raja Durjan Sal, being an expert of diamonds, was known as ‘Heera Raja’ among the people. Who initiated the Navratnagarh Palace in the late 1630 s.
Thus to subdue the Raja of Chotanagpur and to acquire valuable diamonds, Jahangir decided to invade Chotanagpur. It was in the year 1616 when Ibrahim Khan invaded Jharkhand and captured the king . He was imprisoned in Gwalior with other Hindu kings where he was very influenced by them.
In the year 1628 after 12 years of imprisonment, the king was released as a reward to successfully distinguish the real diamond from a flase one. As a reward he also requested the Emperor to release few more kings whom he befriended during the imprisonment. As a return these kings visited Raja Durjan Sal when they found him living in a simple house with his people and regular lifestyle unlike the palace royals.So as a homage they sent their architects, masons, marbles and other materials for the construction of a palace for the Raja Durjan Sal.