# Tetraeder-Substraktion

> sculpture by Alf Lechner, formerly located on the terrace of the Neue Nationalgalerie in Berlin, Germany

**Wikidata**: [Q138198581](https://www.wikidata.org/wiki/Q138198581)  
**Source**: https://4ort.xyz/entity/tetraeder-substraktion


## References

1. [Bildhauerei in Berlin](https://bildhauerei-in-berlin.de/bildwerk/tetraeder-substraktion-6388/)