The following from the "'''Catholic Encyclopedia'''" :  : "''This is the "Psuedosynodus Photiana" '''which the Orthodox count as the Eighth General Council'''''". And the following from "'''Catholic Answers'''" :  :"''The Eastern Orthodox communion bases its teachings on Scripture and "the seven ecumenical councils"—I Nicaea (325), I Constantinople (381), Ephesus (431), Chalcedon (451), II Constantinople (553), III Constantinople (680), and II Nicaea (787). '''Catholics recognize these as the first seven ecumenical councils, but not the only seven'''''.  :'''''While Catholics recognize an ensuing series of ecumenical councils, leading up to Vatican II, which closed in 1965, the Eastern Orthodox say there have been no ecumenical councils since 787, and no teaching after II Nicaea is accepted as of universal authority'''''.  :''One of the reasons '''the Eastern Orthodox do not claim to have had any ecumenical councils since II Nicaea''' is that they have been unable to agree on which councils are ecumenical. In Orthodox circles, the test for whether a council is ecumenical is whether it is "accepted by the church" as such. But that test is unworkable: Any disputants who are unhappy with a council’s result can point to their own disagreement with it as evidence that the church has not accepted it as ecumenical, and it therefore has no authority''". Maybe "''Catholic Answers''"' full name is actually "''Catholic Answers to Catholic Encyclopedia''" ... who knows! :-) P.S. : Am I being "''Anti-Catholic''" by adding this here? :-) [No ill or harm intended ... and sincerely hope none ofence taken].