Hideouts or Sacred Spaces? Experts Baffled by Mysterious Underground Chambers

By Matthias Schulz

Part 2: 'Gateways to the Underworld'

But how old is the vault? The members of the task force were so eager to find an answer that they paid for pollen analyses out of their own pockets.

A few radiocarbon dating analyses have also been performed, and they indicate that the galleries date back to the 10th to the 13th century. Bits of charcoal recovered from the Erdstall tunnels in Höcherlmühle date back to the period between 950 and 1050 A.D.

Heinrich Kusch, a prehistorian from the Austrian city of Graz, believes that these results are incorrect. He suspects that some of the subterranean systems were built about 5,000 years ago, in the Neolithic period. For several years now, he has been probing Austria's Steiermark region with giant drills for "gateways to the underworld."

But Kusch's theory has lost some of its appeal. All of the radiocarbon dating analyses completed to date indicate that the tunnels were built in the Middle Ages, challenging the validity of the prevailing school of thought. It holds that the tunnels were built during the Migration Period (known as the "Völkerwanderung" in German) in the 5th and 6th centuries, when entire tribes left their homes and abandoned the cemeteries of their ancestors. The assumption was that the tunnels and galleries were created so that the dead could still be venerated.

It is clear, at any rate, that they were built by professionals. They dug the tunnels in a kneeling position, using wedge-shaped tools held with both hands. Every few meters, they chiseled cavities into the walls for their oil lamps. They dug the longer passageways in serpentine form to reduce the pressure from the surrounding earth. Supporting planks were not used.

Around the year 1200, the underground labyrinths were filled in and the entrances blocked with rubble. The rubble contained ceramics clearly attributable to the Gothic period.

The confusion over the tunnels is hardly surprising. Some believe that they were used as dungeons for criminals, while others see them as places of healing, where the sick could cast off their afflictions. Still others speculate that they were used by druids.

As a result of the international cooperation of the Erdstall working group, new clues have come to light. The galleries are also concentrated in parts of Ireland and Scotland, and there are also clusters in central France.

This distribution bears intriguing parallels to the routes of the Irish-Scottish traveling monks who, coming from the Celtic north in the 6th century, traveled across the continent as missionaries. The tattooed monks made the passage to the continent from the islands, carrying long staffs and wearing coarse habits.

The legendary Kilian, born in Ireland around 640 A.D., preached in the southern German city of Würzburg. According to a hagiography, angry natives killed him and buried him in a stable. St. Gall (died 640 A.D.) made it as far as Lake Constance.

Ahlborn speculates that these early Christian missionaries also brought along heathen ideas, the remnants of Druid scholarship or special Celtic concepts of the afterlife, which led to the construction of the subterranean galleries.

Perhaps the tunnels were also prisons for demons, evil dwarves and the undead. Some galleries contain traces of building stones and remnants of doors or locks. A sandstone relief was found in an Erdstall at Bösenreutin near the town of Lindau on Lake Constance. It depicts a goblin with a tail attached to its rump.

Were the galleries temples for the superstitious?

Hiding from Bandits

Not everyone finds these spiritual interpretations convincing. Josef Weichenberger can only shake his head when he hears them. He is talking himself into a rage as he speeds from the Bavarian city of Passau toward the Waldviertel region in Lower Austria. "The cult theories are completely erroneous."

Then he offers his interpretation: "The Erdstall galleries were simply hiding places."

Weichenberger's opinion carries some weight. An archivist by profession, he has been crawling through the labyrinths for the last 34 years. He also runs an alarm center from his office. When construction workers report the discovery of an Erdstall, he rushes to the site to document it with a compass and a measuring tape.

For this mole of a man, no tunnel is too narrow and no passageway too moist or dirty.

According to Weichenberger, the galleries in his native Austria were built during the "medieval clearing period" in the 11th century. At the time, settlers from Bavaria traveled down the Danube to cultivate land in the east.

Armed with hatchets, they cut swaths into the wilderness. It was not an entirely safe undertaking. Magyars flooded into the area around 1042. Around 1700, the Hungarian rebels known as Kurucs, with the backing of the Ottoman Turks, ransacked the countryside.

Robbers also posed a threat in the region. They raided remote villages and used crowbars to get into the houses. Weichenberger believes that the farmers quickly fled underground "from this vermin," taking their valuables with them.

In Weichenberger's version of the mystery of the subterranean galleries, the terrified villagers would sit in their hiding places underground, their hearts pounding, while the intruders raged above ground, searching in vain for valuables.

He also offers written evidence. "An old account of a death tells the story of a woman who was so afraid of being discovered that she suffocated her screaming baby in an Erdstall."

With his talk of "murder," "bandits" and people "shaking in terror as they hid underground," Weichenberger makes ancient Austria sound like a lawless region not unlike the Wild West. "That's just the way it was," he says, as he continues to drive eastward. It's the same route the settlers once followed as they cleared the forests in the east.

After four hours on the road, we approach the Kleinzwettl fortified church. The ruins once included a drawbridge and a circular rampart. As churches go, it must have been a veritable fortress.

There is also a system of passageways directly beneath the church. When he surveyed it last November, Weichenberger determined that it was 62 meters long. The entrance is under the granite cobblestones in the sanctuary.

A special permit is needed to enter the dim vault, because of the danger of collapse. At first, we make our way through a muddy, serpentine passageway.

The tunnel gradually becomes narrower. A water leak has transformed the rear section into a mud pit. Water drips from the ceiling. The thought of the heavy church columns resting on the ground above is terrifying.

"It's certainly a little uncomfortable here," Weichenberger admits, "but the people were desperate to stay alive."

To substantiate his theory, Weichenberger even hazarded a survival experiment. He and two colleagues were locked into an Erdstall for 48 hours. The oxygen monitors were soon beeping and the candles they had brought along started flickering oddly. The men dozed away, and whenever breathing became too difficult they crawled into other tunnels. The test was a success.

But what does it prove?

"Some galleries were indeed used as hiding places, but only much later," says Ahlborn, promptly dismissing his rival's theory. "They were also uses as toilets and refuse pits."

Austrian spelunker Edith Bednarik is also certain that the convoluted grottoes could not have been used as hiding places. She offers several arguments to support her case. For one, there are hardly any larger chambers where people could have stayed. The galleries have no "emergency exits," and if there were a fire they would have become "deadly traps." Besides, the smallest tunnels were too narrow for pregnant women.

Besides, if the terrified villagers were tightly packed into the subterranean vaults during attacks, why did nothing fall out of anyone's pockets? There are no food remains or traces of torches.

For these reasons, most experts attribute a sacred and ritual function to the underground landmarks. Many find the idea of a "chamber of souls" particularly attractive.

According to this theory, the galleries were essentially waiting rooms in which the souls of the dead were to spend the period until the Second Coming of Christ -- the Day of Judgment, when Jesus Christ would judge "the living and the dead."

It wasn't until the 12th century that the theology of purgatory became established, which made it possible for souls to become purified. This meant that good people could ascend to heaven right away. The caves would have been useless at that time, which corresponds to the period when they were filled in.

But even this view doesn't explain why the sacred vaults were kept such a secret. And why are there no Erdstalls in Switzerland or in the Black Forest?

For now, the mystery must remain unsolved. "We could use the help of physicists with radiocarbon dating expertise, theologists and specialists in prehistoric mining," says Ahlborn. Not a single doctoral thesis has been written on the subject to date. The dark tunnels are still virtually unknown among academics.

This doesn't trouble farmer Josef Wasmeier. He loves his Erdstall, particularly because of its mysterious aura. Sometimes he crawls into his sandy private cave for half an hour in the evening and meditates. It's "completely quiet" inside, he says, dark and distant like a womb.

"And when I climb back up again, the stars seem so bright you feel you could almost touch them."

Translated from the German by Christopher Sultan

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Graphic: Bavaria's mysterious Erdstall tunnels Zoom
DER SPIEGEL

Graphic: Bavaria's mysterious Erdstall tunnels

Graphic: Distribution of Erdstall tunnels in southern Central Europe Zoom
DER SPIEGEL

Graphic: Distribution of Erdstall tunnels in southern Central Europe



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