| Date | Person | Description |
|---|---|---|
| – 1764 | Béraud, Laurent | Director of astronomical observatory in Lyon |
| 1766 – 1772 | Bošković, Rudjer | Construction supervisor of astronomical observatory in Milan |
| 1784 – 1800 | Gruber, Gabriel | Teacher of architecture, agronomy in Polotsk |
| Lippay, János | Occupied himself with botany, horticulture, agronomy | |
| Taucher, François | Substitute director of astronomical observatory in Trnava | |
| 1773 | Taucher, François | Director of astronomical observatory in Budapest |