Oh, really? Sole custodian of Christian tradition?
[:-)===== (Orthodox monastic smiley.)
Of course, I guess it might depend on how you use the word "Catholic" -- but you seem to be crediting the Latins' claim to the name by attaching it to the forces at Lepanto and Vienna.
You might also want to show a little gratitude for the Orthodox who fell on the Field of Kosovo, those who fought the long defeat to keep the Roman Empire, eventually dwindled to a city state, alive until 1453, and to Vlad Tepes for turning back the armies of Mehmet the Conqueror, or much of Europe outside the Balkans would have fallen in the 15th century.
I think a more friendly term would have been to use the “Apostolic Church”. Both Greek AND Latin. :)