Helena Lekapene, Byzantine empress
Helena Lekapene (Byzantine Greek: Ἑλένη Λεκαπηνή, romanized: Lecapena) (c. 910 – 19 September 961) was the empress consort of Constantine VII, known to have acted as his political adviser and de facto co-regent. She was a daughter of Romanos I Lekapenos and Theodora.