| Date | Person | Description |
|---|---|---|
| 1755 – 1757 | Arbosch, Heinrich | Prefect in Cologne |
| 1773 | Bohusz, Franciszek Ksawery Michał | Prefect in Hrodna |
| 1773 | Frings, Henricus | Prefect in Cologne |
| Fuchs, Jean | Prefect | |
| von Herbert, Joseph | Prefect in Vienna | |
| 1764 – 1766 | Kniażewicz, Grzegorz | Prefect in Warsaw |
| 1647 – 1652 | Verbiest, Ferdinand | Prefect in Brussels |