With regard to my post about how the Bishop of Rome is not a Patriarch ... it has been pointed out to me that as long ago as 1961 one Ratzinger demonstrated that
The principle of Patriarchy is post-Constantinian; it has an administrative sense ... the Roman claim understands itself from the original theological motive of the sedes apostolica ...To the same extent that the "New Rome" made unclear the old idea of sedes apostolica in favour of the notion of patriarchy, the "Old Rome"strengthened the reference to the totally different origin and character of its own authority. This authority is in fact totally different from a primacy of honour among patriarchs, because it is situated on a different level, which is completely independent from such administrative concepts.
This is an interesting demonstration of the continuity of Ratzinger's basic theology, contra those who see him as a one-time 'liberal' who Lost The Faith and Sold Out To Conservatism.
As an Anglican, what particularly strikes me is the similarity between all this and the conclusions, as long ago as the 1930s, of Dom Gregory Dix.
Some time ago now, before JP2 became really sick, Cardinal Ratzinger had promised to write, in his then apparently imminent retirement, a preface to an edition I then hoped to produce of Dix's writings on the papacy ...