Catherine of Bulgaria
|Empress consort of the Byzantine Empire|
|Spouse||Isaac I Komnenos|
|Father||Ivan Vladislav of Bulgaria|
Catherine of Bulgaria (Church Slavonic: Єкатерїна Greek: Αἰκατερίνη Bulgarian: Екатерина, romanized: Ekaterina; died after 1059) was Empress-consort to Byzantine emperor Isaac I Komnenos and co-regent of Constantine X for a period after the abdication of her spouse in 1059. She was a daughter of Ivan Vladislav of Bulgaria and his wife Maria, and thus a sister of Presian and Alusian. Catherine was also a paternal aunt of Maria of Bulgaria.
Isaac abdicated the throne on November 22, 1059. He retired to the Stoudios Monastery and spent the remainder of his life, until his death in late 1060 or 1061, as a monk. Following her husband's abdication, she appears to have co-reigned for a while with Constantine X, but eventually she too retired to the Myrelaion monastery under the monastic name of Xene.
Catherine had at least two children with Isaac:
- Manuel Komnenos (ca. 1030 – 1042/57), probably the "son of Komnenos" recorded as having been engaged to the daughter of the protospatharios Helios. He died sometime between 1042 and 1057.
- Maria Komnene (born ca. 1034), her beauty is remarked upon by Psellos, but she remained unmarried, and retired with her mother to the Myrelaion.
- Kazhdan, Alexander, ed. (1991). The Oxford Dictionary of Byzantium. Oxford and New York: Oxford University Press. ISBN 0-19-504652-8.
- Sewter, Edgar Robert Ashton, ed. (1953). The Chronographia of Michael Psellus. New Haven, Connecticut: Yale University Press.
- Varzos, Konstantinos (1984). Η Γενεαλογία των Κομνηνών [The Genealogy of the Komnenoi] (PDF) (in Greek). Vol. A. Thessaloniki: Centre for Byzantine Studies, University of Thessaloniki. OCLC 834784634. Archived from the original (PDF) on 2019-04-01. Retrieved 2019-06-12.