The documents in our collection are indispensable sources for local history research. Our goal is to meet the demands of research. We strive to inform our users as versatile as possible about the past and present of Hajdú-Bihar County, the historical Bihar, Hajdú County and Debrecen. We collect and process documents related to the historical Bihar County, Hajdú County, Hajdú-Bihar County, Debrecen and the settlements of the county. We strive for completeness. We pay close attention to the local content produced by the local press and the publications of local people. Since 1968 we have been conducting media monitoring service from national and local newspapers, since 1990 this work has been computerized. From 2013 onwards, our “JADOX Hajdú-Bihar County Local History Collection” database is available on our website. Local book presentations, film shows, exhibitions, presentations are organized by our department. We provide local history researchers with the opportunity to present their research results.