Comprises counties of Bedford, Blair, Cambria, Centre, Clinton, Fulton, Huntingdon, and Somerset. Father Demetrius Gallitzin, Russian missionary, labored there. Founded on May 30, 1901 as the diocese of Altoona. Name changed to the diocese of Altoona-Johnstown on October 9, 1957. Suffragan of the archdiocese of Philadelphia. See also: