With humor and gratitude, the Most Rev. William Byrne was installed Monday as the 10th bishop of the Roman Catholic Diocese of Springfield. The Most Rev. William Byrne was ordained and installed as the 10th bishop of the Diocese of Springfield on Dec. 14, at the Cathedral of St. Michael the Archangel in Springfield. SCREENSHOT BY DANNY JIN â THE BERKSHIRE EAGLE Byrne, previously a priest in the Archdiocese of Washington, D.C., will serve as the spiritual leader of more than 160,000 Catholics across Berkshire, Franklin, Hampshire and Hampden counties. Cardinal Sean Patrick OâMalley, the archbishop of Boston, consecrated Byrne on Monday afternoon at the Cathedral of St. Michael the Archangel in Springfield.