He was the owner of a photo studio documenting the city of Kraków and its monuments.
In 1860, after returning from a foreign trip, during which he improved his skills, he moved to Kraków and established a studio.
[3] After returning from a second trip abroad in 1865, the atelier moved to a tenement house at the corner of the Main Square and ul.
Initially, Krieger used the collodion technique, which he replaced with bromo-gelatin after the mid-1880s.
However, the wet collodion plate did not disappear completely from Krieger's factory and was used even after 1890 in reproduction photography.