As Romanos IV set out on he campaign of 1071, he had disagreed with his wife Eudokia, so that she renained in the palace and did not follow him to Hieria as usual. As he crossed the Bosporos a dove of predominantly black colour flew down and landed on his hand. He sent it to Eudokia. Some sources regard this as a peace-offering, and say that the empress then joined him for some days before his departure. It is sometimes made explicit that this was a bad omen