"Sigismund (26 October 1427 – 4 March 1496), a member of the House of Habsburg, was Duke of Austria from 1439 (elevated to Archduke in 1477) ...
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until his death. As a scion of the Habsburg Leopoldian line, he ruled over Further Austria and the County of Tyrol from 1446 until his resignation in 1490." - (en.wikipedia.org 14.03.2020)
