Library Honors Bishop Christoph Keller, Jr. December 14, 2011 News The Rev. Canon Christoph Keller III remembers his father, the Rt. Rev. Christoph Keller, Jr., in a video by General Theological Seminary. Bishop Keller led the Diocese of Arkansas from 1970 to 1981. The seminary’s new library, which opened in November, is named in the bishop’s honor. Canon Keller recently completed a Th.D. degree at the seminary.