The last ruler of the #Makedonian dynasty, which saw the #EasternRomanEmpire regain substantial territory, the Empress #Theodora was crowned as sole ruler on #ThisDayInHistory in 1055. She tried to take power earlier in life but was blocked by sister Zoë. She ruled for 16 months.

#HagiaSophia, the finest church in antique Christendom, was consecrated #ThisDayInHistory in 537. It was the third of that name in #Constantinople, with the prior two lost to riots in 404 & 532. The acme of architecture in the #EasternRomanEmpire, its influence is incalculable.