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 ![Galileo's Military Compass](/sites/g/files/omnuum6316/files/chsi/files/sector_med.jpg)

 

**Galileo's Military Compass**  
  
**This is a rare surviving example of Galileo Galilei's geometrical and military compass, a form of sector invented by Galileo in 1597. It was made by Galileo's personal instrument maker, Marc'Antonio Mazzoleni, who was installed at Galileo's house from 1598.  
  
For a full description of the workings this instrument, visit the [Museo Galileo, Florence, Italy](https://brunelleschi.imss.fi.it/esplora/compasso/dswmedia/simula/esimula1.html).**  
 **CHSI Inv. Number [DW0950](https://qrgo.page.link/2HLEc)  
Date: circa 1604  
Marc'Antonio Mazzoleni  
  
Back to ["Time, Life, & Matter: Colonial Science"](/exhibitions/tlm-colonial-science).**