sentences:  Basil established and staffed ten parochial schools and six catechetical schools throughout the Exarchate.Greek Rite Catholicism in the United States, which began in the 1880s with large-scale emigration from Eastern Europe, was administered by the American Roman Catholic hierarchy, which by the early 20th century instituted a subtle campaign to Latinize its conduct.Fearing that a minority of married Greek Catholic priests might cause envy among celibate Roman Catholic priests, Pope Pius X in 1907 issued an apostolic letter enjoining celibacy upon all Catholic priests in the United States.