| 1893 |
|
Foundation of a law firm by Dr. Richard Lang und Dr. Otto Lang |
| 1903 |
|
Dr. Michael Thalberg joins the law firm as a partner and the name changes into Lang & Thalberg |
| 1907 |
|
Dr. Jakob Thalberg joins the law firm as a partner |
| 1918 |
|
The name of the law firm changes into Advokaturbuero Thalberg |
| 1939 |
|
Dr. Kurt Thalberg joins the law firm as a partner |
| 1972 |
|
Dr. Erik Birgelen joins the law firm as a partner and the name changes into Thalberg & Birgelen |
| 2000 |
|
lic. iur. Michel Wehrli joins the law firm as a partner |
| 2004 |
|
lic. iur. Regula Müller joins the law firm as a partner |
| 2005 |
|
The name of the law firm changes into Birgelen Wehrli Attorneys at Law |
| 2007 |
|
lic. iur. Christoph Birgelen joins the law firm |
