When was the sister of Theodora Porphyrogenita died who was reigned as Byzantine Empress alongside her sister?
Zoë Porphyrogenita Zoë ( "life" ] ; 978 – June 1050) reigned as Byzantine Empress alongside her sister Theodora from April 19 to June 11, 1042. She was also enthroned as the Empress Consort to a series of co-rulers beginning with Romanos III in 1028 until her death in 1050 while married to Constantine IX.
Helena Argyre Helena Argyre or Argyropoulaina (Greek: , Georgian: ელენე , "elene") (died c. 1033) was a Byzantine noblewoman of the Argyros family and Queen Consort of Georgia as the first wife of King Bagrat IV of the Bagratids. She was given off in marriage by her uncle, the Byzantine emperor Romanos III Argyros, to the boy-king Bagrat c. 1032. Helena died within a year or so, without issue.