The remains of the Castle can be visited
Staufenburg Castle

The Staufenburg castle ruin, a former hilltop castle, is on the Burgberg near Seesen-Münchehof in the district of Goslar, Lower Saxony. Its origins date back to the 11th century. Although the complex was never besieged, it is now a ruin with restored wall remnants, whose stones were removed from the 18th century onwards for other buildings in the area.
History+
The first structures of Staufenburg were presumably built in the 11th century by the Counts of Katlenburg. Its main purpose was to protect the Harz mining industry near Gittelde and to secure the Thuringian military road. An indirect mention of the name Staufenburg appears in 1154 in a document by Henry the Lion, who later pledged the castle. After his fall in 1180, it passed to Emperor Frederick Barbarossa and in 1193 to the Archdiocese of Magdeburg. In the early 13th century, the Imperial Seneschal Gunzelin von Wolfenbüttel resided here. From the 14th century onwards, the castle served as an administrative center for the ducal mining and smelting industry in Gittelde. Between 1495 and 1522, it was the widow's residence of Duchess Elisabeth zu Stolberg, who promoted mining in the region.
Image: User AxelHH on de.wikipedia / Public domain via Wikimedia Commons
Location: 51.8207, 10.1666