Recently, the existence of the Teutonic Order’s castle in Jegławki (Jäglack) has been reintroduced into the scholarly literature. This alleged castle was to be destroyed only during the so-called Tatar invasions during the Second Northern War (1655–1660), and in its place a modern palace was built, the present shape of which dates back to the nineteenth century. This single piece of information has already appeared in the historiography, especially in popular research, but also in academic works, not to mention online. At the same time, one can have serious doubts as to the identification of the aforementioned palace in Jegławki as a Teutonic Order castle. Hence, it seems justified to verify this information as soon as possible and correct it, if necessary.