High prelates of Catholic Church celebrate Annual Thanksgiving Pan American Massachusetts in Washington. Attended by diplomats from a score or more of nations and high-ranking government officials, the annual Pan American mass was celebrated at St. Patrick's Catholic Church in Washington today by high dignitaries of the Catholic Church. This picture of the colorful procession preceding the mass shows Most Reverend Tietro Pumasoni-Biondi, (on left wearing mitre) apostolic delegate to the United States, and Archbishop Michael J. Curley, head of the Baltimore diocese, on extreme right