Johann Baptist Firmenich – Kölner Adress-Buch 1844
| Given name | Johann Baptist |
|---|---|
| Family name | Firmenich |
| Occupation | Stadtrath, Rothgerber u. Lederhandel |
| Address | Rothgerberbach 30/32 |
| Place | Köln |
| GOV identifier | KOLOLNJO30LW |
| Book | Kölner Adress-Buch 1844 |
| page | 161 |
| Year | 1844 |