Theodoric IV, Landgrave of Lusatia, also called in German Diezmann, or Dietrich III was a member of the House of Wettin. He was Margrave of Lusatia from 1291 to 1303. He was also Margrave of Osterland from 1291 until his death, and Landgrave of Thuringia, as Dietrich I, from 1298 until his death.
- Occupation
- ruler
- Position held
- March of Lusatia
- Citizenship
- Germany
- Born
- 1260
- Died
- December 10, 1307, December 10, 1307
