The collective book has been created on the occasion of the 500th anniversary (1521–2021) of the extinction of the Opava Přemyslid family, a cadet branch of the Bohemian royal dynasty. It contains studies and contributions by Polish and Czech researchers, is bilingual and refers to written as well as material and artistic sources – therefore, it is a work of historians supported by archaeologists and art historians. The book contains 15, when very extensive, studies on political history, auxiliary sciences of history, prosopography and the sphere of culture, including artistic culture (art). The book is complemented by an extensive list of sources and literature and almost 100 pictures that accompany the text.