Königsberg Castle (Ruin)

Königsberg Castle was built on a peak above the Königsberg district of the municipality of Biebertal in the Gießen district of Hesse in the mid to late 13th century by the Counts of Solms.

Presumably, the hilltop castle was built by Count Marquard von Solms (1225–55) to secure an old road and control the dominion. Around 1250, the county was divided into the territories of Solms-Königsberg (until 1363), Solms-Burgsolms (until 1416), and Solms-Braunfels. Soon after, presumably due to the distance from the more southern possessions, a separate line of the family formed, as Marquard's son, Count Reinbold von Solms (1255–73), called himself Count of Cunigesberg in 1257 (and again in 1266).

Due to the Hesse-friendly policy of this line, the relationship with the cousins from Braunfels and Burgsolms was always strained. Königsberg Castle increasingly lost its importance as a stronghold, so that between 1321 and 1323, Hohensolms Castle was built directly opposite Königsberg.

In 1331, Count Philipp von Solms opened his castles Solms and Königsberg to Archbishop Balduin of Trier, the administrator of the Mainz diocese. In 1350, Landgrave Heinrich II acquired the castle for 2000 guilders. The Landgrave was allowed to live in the castle until his death. With him, the Solms-Königsberg line died out in 1364. The castle itself was garrisoned with burgmannen and thus became the seat of a Hessian office.

The castle was pledged to the Counts of Solms again from 1468–1517.

In 1500, the settlement that had grown up next to the castle was first documented as a "city". During the Thirty Years' War (1647), the city and castle were burned down by Swedish troops. In 1820/27, the Königsberg office was abolished. After that, a chief forestry office was located in the "castle".