EN
The aim of this article is to present a characteristics of two documents, the first from 1189 and the second one dating back to the year 1206. The conducted analysis shows that the publishing place of the two documents was Opatów. The first from the mentioned documents was issued by the duke Casimir II the Just, whereas the second one by his son Leszek the White. The work is an attempt at analyzing testamentation included in both documents in order to study the genealogy of the enlisted witnesses.