The chapter investigates how Bulgaria returned under the jurisdiction of the Church of Constantinople by the decision of the Council of 869/870 and how the church in it was organized during the following decade. The main argument is that the territory of Bulgaria became a full part of the Patriarchate of Constantinople and was divided into a number of metropolitanates, which constituted a diocese comparable to those of Pontus, Asia and Thrace, and not an autocephalous archbishopric. The assumption is based on the decisions of the Council and the proposed dating of the notitia 3 of the Church of Constantinople to c. 870–880, and some new arguments are presented in support of such a dating. The final part of the chapter is dedicated to the diplomatic struggle of the popes to regain influence in Bulgaria in the decade following the Council of 869/870.