# International Prototype of the Kilogram

> physical artifact that formerly defined the kilogram unit of mass

**Wikidata**: [Q3738063](https://www.wikidata.org/wiki/Q3738063)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/International_Prototype_of_the_Kilogram)  
**Source**: https://4ort.xyz/entity/international-prototype-of-the-kilogram