The article discusses ecclesiological issues that were included in the agenda of Pan-Orthodox Council but found no solution in the pre-conciliar debates: the Orthodox Diaspora; proclamation of autocephaly; the role of the Diptychs. The author then examines the issue of primacy in the Universal Church. All these questions can be combined and connected with the issue of the supreme or sovereign power in the Orthodox Church: its localization and mechanics for the implementation.