Pope Francis has accepted the resignation of Bishop Ronald Gainer of Harrisburg. Bishop Gainer, who has headed the Harrisburg Diocese since 2014, turned 75 last August. That’s the age at which church laws require bishops to submit their resignation to the pope. Pope Francis has appointed Auxiliary Bishop Timothy Senior of Philadelphia to succeed Bishop Gainer. Senior will be installed as the 12th bishop of Harrisburg by Philadelphia Archbishop Nelson J. Pérez. That will happen at mass on June 21st at St. Patrick Cathedral in Harrisburg.