Dietrich von Altenburg was the 19th Grand Master of the Teutonic Knights, serving from 1335-41.

Von Altenburg came from Altenburg, Thuringia in the Holy Roman Empire. He served as the Komtur of Ragnit (1320-24) and of Balga (1326-31). He became Grand Marshal of the Order in 1331 and conquered Kuyavia from the Kingdom of Poland. He was accused before a papal tribunal for alleged crimes committed during the Kuyavian campaign.

After he was elected Grand Master, von Altenburg set about building and reconstructing many of the Order's castles. He began the reconstruction of the Church of the Blessed Virgin Mary at Marienburg, the building of the main tower, and commissioned a mosaic figure of the Madonna. The Chapel of St. Anne, the first permanent bridge over the Nogat, and the Bridge Gate were also completed during his service.

Intending to negotiate with Poland, von Altenburg traveled to Thorn (Toruń) in 1341 but died there from an illness in October of that year. He was the first Grand Master to be buried in the Chapel of St. Anne in Marienburg; his original gravestone can still be seen there to this day.
Category:Year of birth missingCategory:1341 deathsCategory:German nobilityCategory:Grand Masters of the Teutonic KnightsCategory:People from AltenburgCategory:Burials in the Chapel of St. Anne, Marienburg (Malbork)de:Dietrich von Altenburgit:Dietrich von Altenburglt:Ditrichas fon Altenburgashu:Dietrich altenburgi várgrófpl:Dietrich von Altenburgsl:Dietrich von Altenburg