Stock im Eisen, Vienna — Visitor Guide & Things to Do Nearby

At the corner of Stephansplatz, behind a pane of glass, stands one of Vienna's strangest and oldest artifacts: a 2.19-meter section of a spruce tree trunk bristling with hundreds of nails hammered in over nearly six centuries. This is the Stock im Eisen, and its story is as layered as the city itself.

The tree started growing around 1400 and was felled around 1440. Remarkably, the first nails were driven in while it was still alive. Iron bands holding the trunk together bear the date 1575 and the initials "HB" (Hans Buettinger, the building owner who reinforced it). Over time, a custom developed among traveling journeyman locksmiths who would hammer a nail into the trunk as they passed through Vienna, a ritual marking their passage and hoping for good fortune.

The legends are even better than the history. One story claims the Devil himself sealed the trunk with an "unopenable lock." Another tells of a locksmith's apprentice who made a deal with the Devil to forge a lock that could never be opened. In reality, the lock's insides are completely hollow, which is why no key will ever fit. It is a clever bit of theatrical legend-keeping that has fooled visitors for centuries.

Similar nail trees exist across Central and Southeastern Europe, but Vienna's Stock im Eisen is the oldest preserved example. It sits right at the intersection of Graben and Karntner Strasse, making it easy to spot if you know where to look. Many people walk past without noticing, which is exactly why a Questo quest through central Vienna is so rewarding. It points out hidden treasures like this one, turning an ordinary stroll into a treasure hunt.