Station: [2] In the Heart of the Rock

You’ve arrived. Right in the middle of the mountain. Please take a seat in the front left pews.

Think back to the passageway you just walked through. The moment you took your first step inside, everything changed. The air grew cooler. The light grew dimmer. The noise of the valley faded behind you. You have literally walked through the mountain.

As medieval as this tunnel feels, it isn’t. It was drilled and blasted into the hard rock as recently as 1980 and 1981. Prior to that, the entire rock face above the church had been secured in a labor-intensive process. That’s because the previous entrance ran along the outside, beneath the overhanging wall. That route had become far too dangerous.

The masses of rock above this place have always hung over the church and the town like the Sword of Damocles. Time and again, chunks broke loose from the wall. Once, it struck the church with full force. On December 23, 1742—two days before Christmas—a rockfall shattered the church. The Gothic cross vault of the nave was completely destroyed. Only in one spot can its remnants still be seen today. A contemporary wrote at the time, to the effect that it would hardly be advisable to rebuild the church in this dangerous location. They did it anyway—though now with a simple wooden ceiling instead of the stone vault.

Today, massive anchors deep within the mountain and steel mesh hold the wall in place. And the tunnel through which you’ve come is, above all, one thing: your safe passage in and, later, out again.

Now just take a look around. You are sitting in the heart of the rock church—in a space unlike almost any other in the world. To your left, right, and above you, you see walls and vaults built by human hands. Yet where every other church would have a plastered back wall, you see bare, rough rock. The mountain itself is the back wall of this house of worship.

The natural rock cave into which the church was built is about 25 meters long, 17 meters deep, and 12 meters high on average. This creates a cavity of about 5,000 cubic meters within the solid rock.

You may notice that the stone has a damp sheen in some places. This is not a construction defect. It is nature at work. Seepage water has been finding its way through the rock for centuries. For the builders, this was a tremendous challenge. Channels were carved into the stone behind the altar and along the sides. They discreetly divert the water. This church has stood for over 500 years because people learned to adapt to the rock rather than fight against it.

The wall facing the valley is also unusual. It is up to one meter ninety thick. Some of the small window openings resemble loopholes more than church windows. Researchers therefore suspect that a defensive structure once stood here in front of the church—a lower castle, referred to simply as “the hole” in old documents. This space thus likely served as a shelter for the people of Oberstein long before it became a place of worship.

Idar-Oberstein also had a city wall, and its remains were used in the construction of the church. The remnants of the city wall can be seen as you exit the church.

Until 1964, the Rock Church served as the Protestant parish church of Oberstein. Today, occasional services are still held here, including the Christmas Eve Mass and regular weddings. People are particularly fond of getting married at this special place. Thus, the Rock Church remains to this day a space where mountain, history, and living faith converge.