I feel that my contributions here are often on the far-fetched side nowadays; but, anyhow... matters of "cathedrals which ceased to be" -- Coventry seems to have been unlucky in the cathedral line. The city's first -- St. Mary's Priory and Cathedral -- was mostly demolished in the course of Henry VIII's Dissolution of the Monasteries: the only English cathedral to be destroyed in that historical episode. Its successor was historically much later, and short-lived: the Parish Church of St. Michael, elevated to Cathedral status in 1918; and we know what happened in 1940 ... hopefully, third time lucky ! Another cathedral-loss, many centuries earlier, involved North Elmham in Norfolk. That settlement had an Anglo-Saxon timber cathedral between about the 7th century; and 1071, when the episcopal see headquarters concerned, was moved to Thetford.