| Date | Person | Description |
|---|---|---|
| 1791 – 1792 | Abramsperg, Antoni | Teacher of languages in Mogilev |
| 1792 – 1796 | Abramsperg, Antoni | Teacher of languages in Daugavpils |
| Eschinardi, Francesco | Occupied himself with optics, civil architecture, military architecture, watchmaking, acoustics, cartography | |
| Zacagnini, Antonio | Studied mathematics, languages in Lyon |