Norwich Cathedral, formally the Cathedral Church of the Holy and Undivided Trinity, is a Church of England cathedral in the city of Norwich, Norfolk, England.

Construction of the building was begun in 1096 at the behest of the first bishop of Norwich, Herbert de Losinga. When the crossing tower was completed, the cathedral was the largest building in East Anglia.

The present structure of Norwich Cathedral is primarily Norman, being made of flint and mortar and faced with a cream-coloured Caen limestone. The cathedral was damaged by rioters in 1272; repairs were completed in 1278. The cloisters, begun in 1297, are the fourth largest cloisters in England. The present spire is a stone structure built in 1480 that replaced one made of wood. In about 1830, the south transept was remodelled by the architect Anthony Salvin.