"Ludwig I or Louis I of Upper Bavaria (German: Ludwig II der Strenge, Herzog von Bayern, Pfalzgraf bei Rhein) (13 April 1229 – 2 February 1294) ...
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was Duke of Upper Bavaria and Count Palatine of the Rhine from 1253. He is known as Ludwig II or Louis II as Duke of Bavaria, and also as Louis the Strict. Born in Heidelberg, he was a son of duke Otto II and Agnes of the Palatinate. She was a daughter of the Welf Henry V, Count Palatine of the Rhine, her grandfathers were Henry XII the Lion and Conrad of Hohenstaufen." - (en.wikipedia.org 31.01.2020)
