Restoration of the Patriarchate of Peć
The Serbian Patriarchate of Peć had ceased to function after the Ottoman conquest of Serbia in 1463, leaving the Church without an independent primatial center. Its reestablishment in 1557 is attributed in the sources to the intervention of Mehmed-paša Sokolović, the Serbian-born grand vizier who was Macarius's kinsman, and Macarius became the first head of the renewed patriarchate.
Under the restored patriarchate the Serbian Church recovered a broad jurisdiction. The sources record that ten new dioceses were created during Macarius's tenure and that the patriarchate's authority extended over the historic Serbian lands; Wikipedia describes a jurisdiction encompassing more than forty eparchies. The renewed Church became a focus for Serbian ecclesiastical and cultural life during the Ottoman period.