In order to perpetuate her power she purposely neglected her son's education, and therefore must be held responsible for the voluptuous character which he developed under the influence of his uncle Bardas, who was Theodora's brother and likewise of Mamikonian heritage. Theodora endeavoured in vain to combat Bardas's authority; in 855 she was displaced from her regency at his prompting, and being subsequently convicted of intrigues against him was relegated to the monastery of Gastria in 857. Both Bardas and Michael would eventually be assassinated by Basil I, who would then usurp the throne and establish the Macedonian Dynasty. Theodora would die sometime after her son's murder in 867. She was canonized in recompense for her zeal on behalf of the restoration of icons as objects of veneration. Her feast day is 11 February.