Bretislav I (Czech: Břetislav I.; c. 1002 – 10 January 1055), known as the "Bohemian Achilles", of the Přemyslid dynasty, was Duke of Bohemia from 1034 until his death in 1055.
HistoryLayer draws the world as it was in any year from 123,000 BCE to
2026. Move the slider and the borders redraw for that year; the map
carries 23,890 events, 12,790 people, 837 wars and 13,183 cities, each
one readable in place. Signing in is optional and lets you keep what
you find.