# Lebesgue's universal covering problem

> unsolved geometry problem

**Wikidata**: [Q28456108](https://www.wikidata.org/wiki/Q28456108)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Lebesgue's_universal_covering_problem)  
**Source**: https://4ort.xyz/entity/lebesgue-s-universal-covering-problem