Lifelong member of Zion Lutheran Church, Ann Arbor, Michigan, Aprill served for several years in the 1990s as a member of the Church's Executive Board. Papers include files relating to the history of Zion Lutheran Church, including a conflict within the church in the mid-1990s.
The Theophil Aprill collection contains two series relating to his activities with Zion Lutheran Church in Ann Arbor, Michigan. These series are Zion History and the Conflict at Zion.