The first known mention of „Nienuoverre“ is documented between 1144 and 1152 in a catalogue of goods gathered for Count Siegfried of Boyneburg – Northeim (1095 – 1144).
In the 12th and 13th century, the castle gained greatest importance while being the centre of a county and residence of the Counts of Dassel and Nienover.
About 1190, power and economic advancement allowed the systematic foundation of a town of approximately 15 acre, a marketplace and roughly estimated 2000 residents.
Nienover was surrounded by a doubled "vallum vossaque".
The foundation of the “County of Nienover” among others also threatened the power of the Bishop of Paderborn who, in 1210/20, added authority to his position by a military campaign.
Due to this conflict, the first mayor town blaze forced the authorities to abandon badly situated property and rebuild the central city area only.
About 1270, another large- scale fire hit and destroyed the town for a second time. According to archeological findings, the fire was a result of a second military conflict, most likely with the bold Duke Albrecht I of Braunschweig who attacked the central of the Solling- County and their comital main residence to force his reign on them.
After 1270, the town decayed in a very short time. About 1300, when the county had finally been sold to the Welfes, the last residents most likely had already left and the town sank into oblivion.
The final destruction of the castle took place during the Thirty Years' War (1618 – 1648). Today, the Renaissance castle, which is used as a stud, is located at that spot.
In the context of the long lasting research of the history of settlement in the Solling area, Prof. Dr. H. G. Stephan (University of Göttingen, now University of Halle) recognized the significance of the area in 1993. Years of sharding and field mapping of the former arable land followed up until 1996 when the first excavation began. Up to 2007, more excavation campaigns followed together with the continuous, interdisciplinary and exceptional study of the area.
(Source:Sonja König, Die Stadtwüstung Nienover im Solling, Materialhefte zur Ur-u. Frühgeschichte Niedersachsens,2009, Band 39)
Attempt to a graphical reconstruction of the left- overs of the town by T. Künzel and a detailed view of it. The red dot on the roof of one of the buildings (right top quater of the drawing) marks the restored house. To view a bigger version of both pictures, please visit the Gallery.