| Date | Person | Description |
|---|---|---|
| Cysat, Johann Baptista | Studied mathematics, astronomical observations in Ingolstadt | |
| 1612 – 1615 | Perovius, Szymon | Studied astronomical observations, proper instrument use in Kalisz |
| Susliga, Wawrzyniec |
Studied astronomy, calendars in Graz
Study and work under Jan Decker |