Eugene, bishop, servant of the servants of God, to his beloved son in Christ, Frederick, illustrious king of the Romans, greeting and apostolic benediction. We have received the messengers and the letter which you sent to inform us of your election by the unanimous vote of the princes.... We give thanks unto God, from whom cometh every good and perfect gift, for this good news, and we heartily approve your election. We are confident that you intend to take upon yourself the fulfilment of the promise which your uncle and predecessor, Conrad, gave to us and to the holy Roman church. We, on our part, shall labor for your advancement and exaltation, as is the duty of our office. We have sent you an ambassador, who will disclose to you our purpose and intention. In the meantime, we admonish you to bear in mind your oath to defend the church and the clergy of God, to keep peace and order, and to protect the widows and the fatherless, and all your people, that those who obey you and trust in you may rejoice, and that you may win glory with men and eternal life with the king of kings. 97. Treaty of Constance, 1153. Jaffé, I, Wibaldi Epp., no. 417; Doeberl, IV, no. 27 a. The situation of the pope was precarious. In the first place, the Romans had rebelled against him and his rule, and had set up a government of their own. Since 1143 he had been compelled to spend most of his time outside of the city. In the second place, Roger of Sicily was in rebellion against him and threatened the papal lands with invasion from the south. And lastly, the Greek emperor was now following a vigorous policy to secure land in Italy. The pope was in sore need of help, especially against the Romans and Normans. Hence he insisted that Frederick should promise to aid him, as well as not to make peace with his enemies without papal consent. Frederick wished the imperial crown, and the papal blessing and support. He was planning the conquest of the Normans, whose territory he regarded as a part of the empire. But in this agreement it will be observed that nothing is said about who owns Sicily and southern Italy, nor is it stipulated that the pope shall not make terms with the Normans without the emperor's consent. Frederick feared that the pope, who wished to gain control of the Greek church, might make terms with the Greek emperor and help him in his efforts to regain a foothold in Italy.