Materials about the relations of the Grand Duchy of Lithuania with the Crimean and Kazan Khanates in the years 1537–1538 from the Radziwiłł archive

Research objectives: This article offers a source study and an edition of the missive Khan Safa Giray Kazan attached to letter King Poland Grand Duke Lithuania Sigismund Old (Zygmunt Stary) which he composent Council Lords Duchy on November 8, 1538. The research aims contextualize khan’s establish its date. materials: copies letters preserved in collection Ignacy Onacewicz Institute Russian Literature (Pushkin House) St. Petersburg, as well published subsidiary materials from archival library collections Warsaw Cracow. Results novelty research: It is established that Giray’s Old, once kept Radziwiłłs’ archive, now Onacewicz’s collection, was sent spring or summer/early autumn preceded by series missives king written during year 1537 (this dating substantiated) larger context wars State with (the Starodub War) Khanate, internal struggle Crimean Khanate. These are texts both king, king’s Lords, for first time.