# Gemma Frisius

> Frisian physician, mathematician and cartographer (1508–1555)

**Wikidata**: [Q455406](https://www.wikidata.org/wiki/Q455406)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Gemma_Frisius)  
**Source**: https://4ort.xyz/entity/gemma-frisius

## Summary
Gemma Frisius was a Frisian physician, mathematician, and cartographer who lived from 1508 to 1555 and also worked as a university teacher, instrument maker, astronomer, engraver, and publisher. He was affiliated with the Old University of Leuven and is commemorated by a moon crater named after him.

## Biography
- Born: 1508, Friesland (region)  
- Nationality: Frisian  
- Education: *not specified in source material*  
- Known for: contributions to medicine, mathematics, cartography, instrument making, astronomy, engraving, publishing, and university teaching  
- Employer(s): Old University of Leuven  
- Field(s): medicine, mathematics, cartography, astronomy, instrument making, engraving, publishing, university teaching  

## Contributions
The source material does not list specific works, publications, inventions, or patents attributed to Gemma Frisius. It only describes his professional roles and affiliations, so no concrete outcomes such as papers, products, or standards can be named from the provided information.

## FAQs
**What professions did Gemma Frisius practice?**  
He worked as a physician, mathematician, cartographer, university teacher, instrument maker, astronomer, engraver, and publisher.

**Where was Gemma Frisius affiliated academically?**  
He was affiliated with the Old University of Leuven, a university founded in 1425 and closed in 1797 located in Leuven (Louvain).

**When did Gemma Frisius live?**  
He was born in 1508 and died in 1555.

**What celestial feature is named after Gemma Frisius?**  
A moon crater bears his name.

**Which historical region is associated with Gemma Frisius?**  
He is linked to the Seventeen Provinces, the union of states in the Netherlands during the 15th and 16th centuries.

**What is Gemma Frisius’s Wikidata description?**  
His Wikidata entry describes him as a “Frisian physician, mathematician and cartographer (1508–1555).”

**How many sitelinks does the Gemma Frisius entry have across Wikimedia projects?**  
The entry has a sitelink count of 34.

## Why They Matter
Gemma Frisius’s multidisciplinary expertise helped bridge medicine, mathematics, and the emerging sciences of cartography and astronomy during the Renaissance. His role as a university teacher at the Old University of Leuven contributed to the dissemination of scientific knowledge in the Low Countries. By engaging in instrument making and engraving, he supported the practical tools needed for observation and measurement, which underpinned advances in navigation and scientific illustration. The naming of a lunar crater after him reflects the lasting recognition of his contributions to science and cartography.

## Notable For
- Frisian physician, mathematician, and cartographer (1508–1555)  
- University teacher at the Old University of Leuven  
- Instrument maker and astronomer  
- Engraver and publisher  
- Associated with the Seventeen Provinces region  
- Honored with a moon crater named Gemma Frisius  
- Wikidata description: “Frisian physician, mathematician and cartographer (1508–1555)”  
- Sitelink count of 34 across Wikimedia projects  

## Body
### Early Life and Personal Background
Gemma Frisius was born in 1508 in the Friesland region. His ethnic identity is noted as Frisian, which situates him within the cultural and linguistic area of the northern Netherlands.

### Professional Roles and Activities
Throughout his life Gemma Frisius practiced multiple disciplines. He worked as a physician, applying medical knowledge to patient care. As a mathematician he engaged with numerical and geometric reasoning. His work as a cartographer involved the preparation of geographical maps. He also served as a university teacher, instructing students at an institution of higher learning. In addition, he functioned as an instrument maker, creating devices for scientific observation. His astronomical activities concerned the study of celestial bodies. As an engraver he produced incised designs, likely for maps or illustrations. Finally, he acted as a publisher, overseeing the dissemination of printed materials.

### Academic Affiliation
Gemma Frisius was affiliated with the Old University of Leuven. This university, founded in 1425 and closed in 1797, was located in Leuven (Louvain) and served as a center of education in the Habsburg Netherlands. His connection to this institution places him within the scholarly community of the sixteenth century.

### Regional and Historical Context
The Seventeen Provinces, a union of states in the Netherlands during the fifteenth and sixteenth centuries, is listed as a related entity. This situates Gemma Frisius within the political and economic landscape of the Low Countries during his lifetime.

### External Recognition
A moon crater has been named after Gemma Frisius, indicating posthumous acknowledgment of his impact on science. This astronomical honor reflects the enduring legacy of his work in fields related to observation and measurement.

### Summary of Wikimedia Data
The Wikidata entry for Gemma Frisius carries the description “Frisian physician, mathematician and cartographer (1508–1555).” The page has a sitelink count of 34, showing its presence across multiple language versions of Wikimedia projects. These metadata points confirm the basic biographical facts provided in the source material.

## References

1. ECARTICO
2. MacTutor History of Mathematics archive
3. Virtual International Authority File
4. Repertorium van Nederlandse kaartmakers
5. Mathematics Genealogy Project
6. [Renaissance and Reformation, 1500-1620: A Biographical Dictionary. 2000](https://books.google.cat/books?id=4bvOEAAAQBAJ&pg=PA158)
7. [The Limits of Influence: Pico, Louvain, and the Crisis of Renaissance Astrology. 2003](https://books.google.cat/books?id=y0yDeNFZOT4C&pg=PA115)
8. Integrated Authority File
9. [Source](https://books.google.cat/books?id=4bvOEAAAQBAJ&pg=PA158)
10. International Standard Name Identifier
11. CiNii Research
12. [Frisius, Gemma Reinerus](https://link.springer.com/rwe/10.1007/978-0-387-30400-7_486)
13. Biografisch Portaal
14. The Stuttgart Database of Scientific Illustrators 1450–1950
15. Early Modern Letters Online
16. Autoritats UB
17. Catalogue of the Library of the Pontifical University of Saint Thomas Aquinas
18. Digital Library for Dutch Literature
19. VcBA (identifier)
20. NUKAT
21. datos.bne.es
22. Complete Dictionary of Scientific Biography
23. Czech National Authority Database
24. SNAC
25. Freebase Data Dumps. 2013
26. [Source](https://archive.org/stream/biobibliographie00ortruoft/biobibliographie00ortruoft_djvu.txt)
27. [Source](http://digitale.beic.it/primo_library/libweb/action/search.do?fn=search&vid=BEIC&vl%283134987UI0%29=creator&vl%28freeText0%29=Gemma%20Frisius%20Rainer)
28. [Source](https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/gemma-frisius-reiner)
29. [Source](https://books.google.cat/books?id=y0yDeNFZOT4C&pg=PA115)
30. [Source](http://dantiscus.ibi.uw.edu.pl/?f=personDetails&person=95)
31. LIBRIS. 2013
32. Provenio
33. HMML Authority File
34. Digital Scriptorium Catalog