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Vratislaus(orWratislaus)I(Czech:Vratislav I.;c. 888– 13 February 921), a member of thePřemyslid dynasty,wasDuke of Bohemiafrom 915 until his death in 921.
Upon the death of his elder brother Spytihněv in 915, Vratislaus became duke at a time when theBohemianlands aroundPrague Castlehad already distanced themselves from the political and cultural sphere ofGreat Moraviaand fallen under the influence ofEast Francia,especially during the rule of DukeArnulf of Bavaria.The contemporaryAnnales Fuldensesreport that the Bavarian forces had attacked PrinceMojmír II of Moraviain alliance with the Bohemians already in the year 900. On the other hand, Duke Vratislaus offered theHungarian invadersfree passage and supported their campaign against theSaxondukeHenry the Fowlerin the year 915.
Vratislaus is credited with the establishment ofSt. George's Basilicaat Prague Castle and also with the foundation of theSilesiancity ofWrocław(Breslau), whose Latin name "Vratislavia" denotes his initiative. He died in battle against the Hungarians, possibly in 919, although 921 is more often conjectured.
^Loserth, Johann (2008). "Propast hrvatske kneževske obitelji Slavnikovića" [The collapse of Croatian princely family Slavniković]. In Nosić, Milan (ed.).Bijeli Hrvati II[White Croats II] (in Croatian). Maveda. pp. 168–169.ISBN978-953-7029-12-8.
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