| Date | Person | Description |
|---|---|---|
| Cysat, Johann Baptista | Cysat helped Scheiner to conduct astronomical observations in Ingolstadt | |
| Cysat, Johann Baptista | Cysat was the successor of Scheiner in teaching mathematics in Ingolstadt | |
| Krüger, Oswald | Krüger studied mathematics, architecture and astronomy in Rome under Grassi and Grienberger |