Magdalenenberg, Iron Age burial mound in Villingen-Schwenningen, Germany

The Magdalenenberg is a grass-covered Iron Age tumulus about two kilometres south-west of Villingen's centre, now roughly 8 metres high with a diameter of about 100 metres; it once stood 10–12 metres high and measured 102–104 metres across. Its volume of 33,000 cubic metres makes it the largest Hallstatt-period burial mound in Central Europe. No chamber or museum is inside the mound; the excavated finds and the prince's wooden burial chamber are shown in the Franziskanermuseum in Villingen.

Dendrochronology of the central chamber dates the mound to 616 BCE. In the following decades 126 graves were placed concentrically around it. Around 500 BCE robbers plundered the central tomb; their wooden spades were later found. Excavations in 1890 and 1970–1973 recovered the robbed chamber, a four-wheeled wagon, a horse bridle and a pig's bones.

The name Magdalenenberg goes back to a "Maria magdalenen creitz" marked on a 1610 map; a 1704 siege sketch shows a Lorraine cross at the spot. In the 1640s, during Villingen's witch trials, women confessed under torture to dancing with the devil on the hilltop. Since 2014 the Keltenpfad trail links the mound with the Franziskanermuseum, with panels along the way.

The Keltenpfad, opened in September 2014, links the mound with the Franziskanermuseum in Villingen; panels along the way explain the site and some wooden poles have been re-erected in their original positions. The mound lies about two kilometres south-west of Villingen's centre at the edge of the Laible woodland, and the walk is on open ground, so wear footwear for field and forest paths.

The 126 graves laid concentrically around the central tomb were read by archaeologist Allard Mees in 2011 as a lunar calendar, with the positions of the burials mirroring northern constellations and the moon cycle rather than the sun. Other scholars dispute the method. Wooden poles found inside the mound are interpreted as markers of the lunar standstill.