Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

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