Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

A cathedral is a Christian church that is the seat of a Bishop .

A cathedral is a church that contains the " cathedra " of a bishop , thus serving as the central church of a diocese , conference , or episcopate .