 It is unknown if Dúnán or Roolwer himself were consecrated by the Archbishop of Canterbury, although Radulf apparently received consecration from the Archbishop of York in about 1073.The site of Roolwer's cathedral is also unknown, although it may have been seated on St Patrick's Isle.In fact, the surviving stone tower on this island appears to date to the mid eleventh century, and made have been erected by Roolwer himself.