# The Loop

> circuit of elevated rail that forms the hub of the Chicago 'L' system in the United States

**Wikidata**: [Q2225459](https://www.wikidata.org/wiki/Q2225459)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/The_Loop_(CTA))  
**Source**: https://4ort.xyz/entity/the-loop


## References

1. Encyclopedia of Chicago
2. [Source](https://loc.gov/pictures/item/il0389/)
3. [Source](https://tile.loc.gov/storage-services/master/pnp/habshaer/il/il0300/il0389/data/il0389data.pdf)
4. [Chicago, the Transit Metropolis. National Museum of American History](https://americanhistory.si.edu/ko/node/46947)
5. [Source](https://www.transitchicago.com/looptrackrenewal/)
6. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
7. Library of Congress Subject Headings
8. Freebase Data Dumps. 2013
9. National Library of Israel Names and Subjects Authority File