Which English cathedral is the seat of the Bishop of Norwich?

The English cathedral that is the seat of the Bishop of Norwich is Norwich Cathedral.

Formally called the Cathedral Church of the Holy and Undivided Trinity, it is a Church of England cathedral in Norwich, Norfolk. It is the mother church of the Diocese of Norwich, whose bishop’s official seat, or cathedra, is located there.

The see was transferred to Norwich in 1094, and construction of the present cathedral began in 1096 under Herbert de Losinga, the first bishop of Norwich. The building is chiefly Norman rather than purely Gothic, although later additions include Gothic work and an impressive medieval cloister.

The wording can cause confusion because Norwich also has a Roman Catholic cathedral, St John the Baptist Cathedral. That building belongs to the Diocese of East Anglia; the Bishop of Norwich specifically is the Church of England diocesan bishop associated with Norwich Cathedral.