MARIA Lekapene. "The wife of Tsar Peter is the (unnamed) daughter of Christoforos according to Liudprand, the marriage taking place just after the Tsar's accession after which she adopted the name IRINA."
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Adelbert Davids (2002). The Empress Theophano: Byzantium and the West at the Turn of the First Millennium. Cambridge University Press. Str. 73.