# gal-compass

Date: 1597

## The fact

In the 1590s Galileo sold a geometric-military compass with a manual. It is an instrument business, not Sidereus Nuncius. Galileo Galilei's documented role is: He designed and sold compasses with a manual. Artisans made them; he did not uniquely invent all proportional compasses.

## Context

Private pupils bought. Sharing manufacture with unnamed makers is required. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Contribution type is direct. Driver [labour-market-tightness](/drivers/labour-market-tightness) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

If a number is not in the two records named above, it is not supplied here.

## Evidence and sources

Official locator: Museo Galileo — geometric compass heritage at https://brunelleschi.imss.fi.it/itineraries/itinerary/GalileoGalilei.html (Museo Galileo / IMSS). Independent locator: Britannica — Galileo, military compass at https://www.britannica.com/biography/Galileo-Galilei (Encyclopaedia Britannica). Official carrier: Museo Galileo — geometric compass heritage (https://brunelleschi.imss.fi.it/itineraries/itinerary/GalileoGalilei.html; Museo Galileo / IMSS). Independent carrier: Britannica — Galileo, military compass (https://www.britannica.com/biography/Galileo-Galilei; Encyclopaedia Britannica).

Official or archival record: Museo Galileo — geometric compass heritage (https://brunelleschi.imss.fi.it/itineraries/itinerary/GalileoGalilei.html; Museo Galileo / IMSS).

## Significance

A sold calculating instrument is an industrial-method path. The welfare reading on this path is improving.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## What is established and what is not

The contribution type is direct. The attached driver is labour-market-tightness. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

Confidence is stated on the impact path, not hidden in adjectives. A later museum is a carrier, not 1597. Do not treat UNESCO as his act.

Naming Galileo Galilei does not delete co-authors, institutions, or later transmitters. The lag from 1597-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

## People

- Galileo Galilei: https://factrail.ai/people/galileo-galilei

## Drivers

- Labour-Market Tightness: https://factrail.ai/drivers/labour-market-tightness

## Sources

- https://brunelleschi.imss.fi.it/itineraries/itinerary/GalileoGalilei.html
- https://www.britannica.com/biography/Galileo-Galilei

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/gal-compass