Background
He was a son of Duke Bořivoj I of Bohemia by his wife Ludmila and the younger brother of Duke Spytihněv I. Around 906 he married Drahomíra, a Hevellian princess, establishing close ties with the Polabian Slavs.
He was a son of Duke Bořivoj I of Bohemia by his wife Ludmila and the younger brother of Duke Spytihněv I. Around 906 he married Drahomíra, a Hevellian princess, establishing close ties with the Polabian Slavs.
Vratislaus had at least two sons, Wenceslaus and Boleslaus, both of whom succeeded him as Bohemian dukes. The contemporary Annales Fuldenses report that already in 900 the Bavarian forces had attacked Prince Mojmir II of Moravia in alliance with the Bohemians. On the other hand, Duke Vratislaus offered the Hungarian invaders free passage and supported their 915 campaign against the Saxon duke Henry the Fowler.
Vratislaus is credited with the establishment of Saint George"s Basilica at Prague Castle and also with the foundation of the Silesian city of Wrocław (Vratislavia).
He died in battle against the Hungarians, possibly in 919, although 921 is more often conjectured.