Константин VII Багрянородный
Constantine VII was too young to rule on his own, and the governorship was created. Later in May 919 Constantine VII married Helena Lekapene, daughter of Romanos Lekapenos. In December 920, Romanos I Lekapenos (920-944) was crowned a co-emperor, but he really took over the imperial reign in Constantinople. From 920, Constantine VII become increasingly distant from the imperial authorities; until December 944, when the sons of Emperor Romanos I suddenly rebelled and cloistered their father. Constantine VII, with the help of his supporters, cloistered his brothers-in-law, and personally ruled by the Eastern Roman Empire from January 945 to his death in November 959.