To reconstruct a family tree and trace ancestry in Czechia, we work with a wide variety of archival sources: parish registers, church books, census records, property inventories, legal cases, school documents, personnel files, guild registries, and institutional archives. Each source is examined with great precision and deep contextual understanding to extract every possible piece of genealogical information and avoid omissions or misinterpretations. Special attention is given to records preserved in Czech, German, Latin, and Hebrew — depending on the time period, geographic region, and religious affiliation of the family we are researching. Church books of Catholic, Protestant, Orthodox, and Jewish communities remain one of the most valuable and reliable sources for tracing key vital life events and reconstructing family histories in detail. These documents allow us to establish essential biographical data, such as dates and places of birth, baptism, marriage, and death, as well as occupation, property ownership, social status, patterns of geographic mobility, and long-term settlement trends across several generations with remarkable accuracy.