Title: Humbert und Kerullarios
First published: 1924
Subjects: Eastern and Western Church, Schism
People: Michael Cerularius, Patriarch of Constantinople (ca. 1000-1059), Humbertus Cardinal (ca. 1000-1061), Leo IX Saint, Pope (1002-1054), Humbertus Cardinal (d. 1061?), Leo IX Pope (1002-1054)