| Date | Person | Description |
|---|---|---|
| Kögler, Ignaz | In Beijing, von Hallerstein assisted Kögler in his position as director of the astronomical commission | |
| Rieger, Christian | Rieger was assistant and later director at the Vienna museum for natural sciences | |
| Vota, Carlo Maurizio | Vota spent 17 years in Venice during which he made a name for himself and was director of the geographical academy in Turin for twelve years, he was also a papal envoy to the royal courts in Vienna and Warsaw and spent some time in Moscow |