Results 1 results found St. Columb's Cathedral in the walled city of Derry, Ulster, Northern Ireland, United Kingdom, Europe Ireland, North, Derry, St Columb's Cathedral, Ornate gateway detail with coat of arms. Ireland, North, Derry, St Columb's Cathedral with cannon on city walls in the foreground. Ireland, North, Derry, St Columb's Cathedral, View of facade and spire.