The origins of Ely Cathedral date back to the seventh century, when a monastery was founded on the site by St Etheldreda. The monastery was destroyed by the Danes in the ninth century, but was refounded as a Benedictine abbey in 970. Abbot Simeon oversaw rebuilding work in 1083, following which Ely became a cathedral in 1109. The monastery was dissolved in 1539, but the cathedral was refounded, with a dean and chapter, in 1541.
From the guide to the Ely Cathedral: Statutes, Late 17th century, (Cambridge University Library, Department of Manuscripts and University Archives)