Church Councils

Do Eastern Catholic bishops participate in Roman Catholic Church Councils? If so, in what capacity?

Concerning Roman Catholic Church Councils, I assume that you are referring to Councils such as Trent and Vatican II, not Bishops Conferences. Eastern Catholics participated as full members in both Vatican I and II, and played a crucial role in the proceedings of Vatican II. Some of the documents from these Councils had no effect on Eastern Catholics (such as those involving the Latin Liturgy and Latin disciplines). Yet several documents from Vatican II had an enomorsely positive effect on Eastern Catholics.