Kolberg's first, yet incomplete, ethnographic regional monograph (from 1865) concerns the area of Sandomierz and Opatów. 

Kolberg remarked on the inhabitants of this area:

“The way of life of the Sandomierz people create a tremendous opportunity for a researcher interested in old beliefs and social order of this part of Poland. It is not only because some of the rites are cultivated here longer than in other regions, but there are also numerous venerable traditions”.