"Ottokar IV (19 August 1163 – 8 May 1192), a member of the Otakar dynasty, was Margrave of Styria from 1164 and Duke from 1180, when ...
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Styria, previously a margraviate subordinated to the stem duchy of Bavaria, was raised to the status of an independent duchy." - (en.wikipedia.org 05.12.2020)