# 21C3

> 21st Chaos Communication Congress

**Wikidata**: [Q63968628](https://www.wikidata.org/wiki/Q63968628)  
**Source**: https://4ort.xyz/entity/21c3


## References

1. [Source](https://events.ccc.de/congress/)
2. [Source](https://events.ccc.de/congress/2004/tickets.en.html)