The commandery in Szestno does not appear in any previous lists of the Teutonic Order’s commanderies. However, there are some mentions in written sources that prompt the question in the title. This concerns a series of documents relating to the Szestno and Lec (Giżycko) districts at the beginning of the 16th century: Sehesten and Letzen. Extraordinarie [1503–1523]. This only contains their regests, but usually copies of these documents have been preserved within the Ordensbriefarchiv collection. The Hauskomptur zu Sehesten is mentioned at the very beginning of this register. Unfortunately, the register, as well as the preserved copy, is not dated. There are also another two regests of documents issued in 1516, including one by the Szestno commander (Compthur von Sehesten) and the other containing his account (Comptur zu Sehesten). A further document has survived in the Ordensbriefarchiv collection, mentioning the commander in Szestno. The final document mentioning the commander in Szestno comes from the Pergamenturkunden collection. There can be no question of a mistake by the writers or copyists, and sooner or later there are other mentions of Szestno officials – prosecutors (Pfleger) and a governor (Stathalter).