Nicholas I, Duke of Troppau
BOHEMIAN NOBLE
Nicholas I of Opava; Adelaide of Habsburg; Adelheid (d. 1313); Nicholas I, Duke of Opava; Nicholas I of Bohemia; Nicholas I of Troppau
Nicholas I () (c. 1255 – 25 July 1318) was the natural son of Bohemian king Ottokar II Přemysl and his mistress Agnes of Kuenring. In 1269 he became Duke of Opava (at modern day Opava, Czech Republic) and thereby the progenitor of the Silesian cadet branch of the Přemyslid dynasty that lasted until 1521.