Jan III of Oświęcim

Jan III of Oświęcim (Polish: Jan III oświęcimski) (1366 – by 19 August 1405) was a Duke of Oświęcim since 1376 until his death.

He was the eldest child and only son of Duke Jan II of Oświęcim by his wife Hedwig, daughter of Ludwik I the Fair, Duke of Brzeg. Initially, historians thought that Dukes Jan II and Jan III are the same person, until the discovery of further sources who confirmed Jan III's existence.

Little is known about Jan III's rule. Maybe, just like his grandfather Jan I the Scholastic, he was initially designed to the Church. This is confirmed by a document dated from 1379, where Jan III is called Scholastic of Kraków (although may be is a mistake with Jan I). Another proof of the presumed destination of Jan III to the spiritual career was the agreement in 1372, under which Jan II ensured the inheritance of Oświęcim to Przemysław I Noszak, Duke of Cieszyn on his death.

However, after Jan II's death in 1376, his son could succeeded him, but under the guardianship of Przemysław I Noszak. This fact confirms by a document from 25 November 1377 in which the Duke of Cieszyn approves the Oświęcim succession.

Despite his sujetion to the Duchy of Cieszyn, Jan III tried to hold an independent policy. In 1394 he married to Hedwig (d. aft. 13 May 1400), daughter of Algirdas, Grand Duke of Lithuania and sister of King Władysław II Jagiełło of Poland, which enabled him to improved the relations between Poland and his relative Władysław Opolczyk.

In 1397, together with the other Silesian Dukes and the Bishop of Wrocław, Jan III signed in Legnica an arrangement with the Polish King, to guarantee the common action against robbery. In 1399, Jan III tried to appease the anger of King Władysław II Jagiełło against the Bishop-Duke of Opole Jan Kropidło.

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Wikipedia