Diedrichsburg, Neo-Gothic tower building in Melle, Germany

Diedrichsburg is a 26-metre-high tower built from 1844 in neo-Gothic and neo-Romanesque style on the Meller Berg, flanked by two single-storey, palace-like wings. It imitates a medieval bergfried but has no ring walls or other fortifications. The crenellated viewing platform on the tower is accessible.

Diedrichsburg was built from 1844 to 1860 in the Historicist castle-romantic style for General Ernst Freiherr von Vincke, whose family seat was nearby Gut Ostenwalde. The royal Hanoverian building officer Emanuel Quaet-Faslem, born in Belgium and working in Nienburg/Weser, designed it, and it was completed under Vincke's son-in-law Count Werner von der Schulenburg-Wolfsburg. A tower fire on 16 May 1909 destroyed its timberwork and staircase; the building was lived in and run again only from 1954, and vandalism in 1983 led to renovation and management by the Melle-Mitte improvement association from 1 July 1985.

The name recalls a legend linking the site to Count Dietrich von Ringelheim, a great-grandson of Widukind, and to his daughter Matilda, later wife of Henry I. Whether this tale was invented as a pseudo-historical backdrop for the 19th-century building is unclear. Today the tower room holds an exhibition on local wildlife.

The tower's crenellated viewing platform is open to visitors and gives a wide view over Melle and the surrounding countryside, especially since storm Kyrill felled many trees in 2007. A restaurant in the building serves excursion guests, and the tower room holds an exhibition on local wildlife and plants. The former wildlife park around it was dissolved in 2021.

The 26 m tower stands on the summit of the Meller Berg, where an Iron Age ring wall of about 3.4 ha once ran 300 m long and 100 to 125 m wide. Archaeologists dated it to around 300 BC from grain found in root plates after storm Kyrill in 2007.