Dziekanka/Tiegenhof – stan wiedzy o funkcjonowaniu zakładu podczas II wojny światowej

The article presents the state of research on the history of the mental institution known as Dziekanka during World War II. New information discovered by German authors and increasing knowledge about the course of Aktion T4 makes it possible to verify erroneous findings and contributes new elements to the overall picture. For instance, it is demonstrated that not all of the murdered patients lost their lives as part of Aktion T4, or that – despite the claims of certain Polish authors – Tiegenhof was also a site where treatment and research did take place. The paper offers an overview of literature concerned with Dziekanka/Tiegenhof, discusses extermination of its patients, the individuals responsible and the connection with Aktion T4, as well as the significance of the institution in the Warthegau province; the question of the number of victims is also addressed.