Karl III., Heiliges Römisches Reich, Kaiser2024-11-120884-09-190884-09-191981-12-01https://urkundenrepositorium.uni-marburg.de/handle/lba/2387Archivsignatur: Ks.selekt Nr.56https://creativecommons.org/licenses/by/4.0/Kaiser Karl III. an Regensburg, Kapelle, Marien- - 0884-09-191981-12-01