| Date | Person | Description |
|---|---|---|
| – 1764 | Béraud, Laurent | Director of astronomical observatory in Lyon |
| 1766 – 1772 | Bošković, Rudjer | Construction supervisor of astronomical observatory in Milan |
| Eschinardi, Francesco | Occupied himself with optics, civil architecture, military architecture, watchmaking, acoustics, cartography | |
| Taucher, François | Substitute director of astronomical observatory in Trnava | |
| 1773 | Taucher, François | Director of astronomical observatory in Budapest |