Leo IX Supported Greek Church in 11th Century

7. In the eleventh century, several Latin churches observing the Latin rite thrived in Constantinople, Alexandria, and the Patriarchate of Jerusalem; just as in Rome, Greek churches performed sacred ceremonies in the Greek rite. Michael Cerularius, the impious restorer of the schism, commanded the closing of the Latin Churches. St. Leo IX, however, did not respond in kind although he could readily have done so; rather than closing the Greek churches in Rome, he desired them to remain open. And so when he complained of the insult done to the Latins, he added: "See how much more restrained, moderate, and kindly towards you the Roman church is here! Although there are many Greek monasteries or churches, both inside and outside Rome, none of these has yet been disturbed or forbidden to follow the tradition of its fathers or its own custom; rather all of them are advised and urged to observe it." (I Ep 9)