Page "Romanos IV Diogenes" Paragraph 3

The problem Romanus and Eudokia had in executing this plan was that Eudokia's deceased husband, Constantine X, had made her swear an oath never to remarry.

She approached the Patriarch John Xiphilinos and convinced him both to hand over the written oath she had signed to this effect, and to have him pronounce that he was in favour of a second marriage for the good of the state.

The Senate agreed, and on January 1, 1068 Romanus married the empress and was crowned Emperor of the Romans.