Ely Cathedral, formally the Cathedral Church of the Holy and Undivided Trinity, is an Anglican cathedral in the city of Ely, Cambridgeshire, England.. The cathedral has its origins in AD 672 when St Etheldreda built an abbey church. The present building dates back to 1083, and it was granted cathedral status in 1109.

Until the 17th century, the area was an island surrounded by a large area of fenland, a type of swamp.It was coveted as an area easy to defend, and was controlled in the very early medieval period by the Gyrwas, an Anglo-Saxon tribe.Upon their marriage in 652, Tondbert, a prince of the Gyrwas, presented Æthelthryth (who became St. Æthelthryth), the daughter of King Anna of the …