Original: Ely Cathedral ( in full , The Cathedral Church of the Holy and Undivided Trinity of Ely ) is the principal church of the Diocese of Ely , in Cambridgeshire , England , and the seat of the Bishop of Ely .
Simplified: Ely Cathedral ( full name : The Cathedral Church of the Holy and Undivided Trinity of Ely ) is the main church of the diocese of Ely , in Cambridgeshire , England .