The coat of arms of the Most Reverend Hugh Charles Boyle, DD who served as the Sixth bishop of Pittsburgh, Pennsylvania from 1921-1950. His arms are in the older style popular at that time and include the mitre and crozier as well as the episcopal cross (not to be confused with a processional cross) and galero. In 1969 Pope Paul VI’s instructions discontinued the use of the mitre and crozier in the coats of arms of people even though they are frequently used as external ornaments in the coats of arms of corporate bodies such as dioceses and abbeys.
The arms of the See of Pittsburgh were based on those of the city of Pittsburgh which, in turn were based on those of William Pitt. In the diocesan arms the bezants (gold roundels) have been changed to crosses and the inclusion of the sword alludes to the titular patron of the cathedral: St. Paul.
Very nice! Unfortunately, I cannot find a color image.
UPDATE: An intrepid reader informs me this is actually the arms of Bishop Regis Canevin, also of Pittsburgh.