Otto II the Black

Otto II the Black (Czech: Ota II. Černý; c. 1085 – 18 February 1126), a member of the Přemyslid dynasty, ruled as a Moravian prince in Olomouc from 1107 and in Brno from 1023 until his death.

He was a younger son of Prince Otto I of Olomouc and his wife Euphemia, a daughter of the Árpád king Béla I of Hungary. He thereby was the grandson of the Bohemian duke Bretislav I. His father ruled in Olomouc since about 1055, troubled by the centralist efforts of his elder brothers Spytihněv II and Vratislav II ruling as Bohemian dukes. When he died in 1087, Otto II and his elder brother Svatopluk were expelled from Olomouc.

While the dynastical struggles within the Přemyslid family continued, Otto II and Svatopluk were able to return to Moravia in 1091. Svatopluk finally ascended the throne in Prague in 1107, having deposed his cousin Bořivoj II. Otto temporarily acted as a Bohemian regent; in 1108/09 he and Savatopluk were taken hostage by King Henry V of Germany. When Svatopluk was killed in September 1109, his brother Otto, though with considerable support by the Bohemian nobility, was not able to assert his claims to the Prague throne, which was taken by Otto's cousin Vladislav I.

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