Pulcheria pəlkēr´ēə [key], 399–453, Roman empress of the East (414–53), daughter of Arcadius and Eudoxia. She became coruler with her brother, Theodosius II , and regent in 414. Theodosius remained under her influence most of his life. Pulcheria took a vow of chastity and brought an almost monastic atmosphere to the Byzantine court. At her brother's death (450) she chose Marcian as emperor and nominally married him.
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