"Siegfried of Anhalt (c. 1132 – 24 October 1184) was born as the third son of Sophie of Winzenburg and her husband Albert the Bear, then ...
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Count of Anhalt, of the House of Ascania. In 1168 he was elected Archbishop of Bremen. Afterward he became Prince-Bishop of Brandenburg (1173–1179) as Siegfried I. In 1179 he succeeded in getting it upgraded to a Prince-Archbishopric of imperial immediacy in 1180, thus becoming Prince-Archbishop of Bremen. He was a strong advocate of Ascanian clan interests." - (en.wikipedia.org 28.10.2019)
