Fr. Seraphim Rose: Orthodox Survival Course:
"First of all, in the 800's there was the rival empire of Charlemagne that was consciously set up as a rival. The Pope indeed chose Charlemagne over Irene the Easterner who was for the icons, and Charlemagne was against the icons, and also favored the Filioque. Already we see that this is very shaky. And this empire gave rise to what was called the Holy Roman Empire in the West."
Letters of Fr. Seraphim Rose (1961-1982)
252.
March 22/April 4, 1978
St. Basil of Ancyra
P.p.s. Regarding the question of Western saints in the Calendar. We would agree with what you say about the impossibility of including some few Western “saints” in Orthodox Calendars (Nicholas I, Charlemagne); but such ones are really very few. Why not a conciliatory attitude towards Augustine of Canterbury and Wilfred: By the way, the Sobor of Bishops of the Russian Church Abroad did give official approval to the veneration of St. Anschar of Hamburg—in the early 1950s, I believe, as reported in The Orthodox Word, 1971, March-April.