 It has also previously operated under the name the Roman Catholic Diocese of Alexandria in Ontario.On May 6, 2020, Pope Francis has ordered the merging of the Archdiocese of Ottawa and the diocese of Alexandria-Cornwall in Canada and has named the current Archbishop of Ottawa, Terrence Prendergast, as Archbishop of the new ecclesiastical circumscription of Ottawa-Cornwall.The see of Alexandria-Cornwall was vacant following the appointment of then-bishop Marcel Damphousse as the Bishop of Sault Sainte Marie on November 12, 2015.