Dietrich von Altenburg

Dietrich von Altenburg was the 19th Grand Master of the Teutonic Knights, leading the Order from 1335 until his death in 1341. He joined in 1307 and became Grand Marshal in 1331, reviving the war with Władysław I of Poland; after the Battle of Płowce the Order held Kuyavia and Dobrzyń Land.

The 1335 Congress of Visegrád gave Poland Kuyavia and Dobrzyń while the Order kept Pomerelia, over Polish protests; a 1339 Curia order to surrender the disputed lands was never approved by the Pope.

As Grand Master he rebuilt the Order's castles and, at Marienburg, the church and its main tower, finishing the Chapel of Saint Anne. He died of illness at Thorn in October 1341 on his way to negotiate with Poland, the first Grand Master buried in the chapel; peace came only in 1343.