Johann I., Brandenburg, MarkgrafOtto III., Brandenburg, Markgraf2024-01-022024-01-021244-01-2028.04.19801244-01-203106https://urkundenrepositorium.uni-marburg.de/handle/lba/5815imagehttps://creativecommons.org/licenses/by/4.0/Brandenburg, Markgraf Otto III. von; Brandenburg, Markgraf Johann I. von an Brandenburg,- Geistliche - 20.1.124410.06.1983