Three Oecumenical Conferences have been held - two at City Road, London, in and 1901, and one at Washington in 1891.
Oecumenical council began its sittings in Rome, and on the 18th of July 1870 proclaimed the infallibility of the pope (see VATICAN COUNCIL).
Articles 6 and 7 forbade access of any Italian official or agent to the above-mentioned palaces or to any eventual conclave or oecumenical council without special authorization from the pope, conclave Or council.
The first trace of system is in the limited right of appeal given by the first oecumenical council of Nicaea and its provision that episcopal sentences or those of provincial synods on appeal were to be recognized throughout the world.
In both cases, apparently, an oecumenical synod ignored the Roman deposition and judged the alleged offences of the respective patriarchs in first and last instance.
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