| Date | Person | Description |
|---|---|---|
| Krüger, Oswald | Studied mathematics, astronomy, architecture in Rome | |
| 1625 – 1626 | Krüger, Oswald | Teacher of syntax in Polotsk |
| Krüger, Oswald | Occupied himself with astronomy, astronomical observations, ballistics | |
| Krüger, Oswald | Krüger studied mathematics, architecture and astronomy in Rome under Grassi and Grienberger |