A Viking fortress of international importance has been uncovered at Annagassan, Co Louth. It is believed to be the longphort (ship fortress) of Linn Duchaill, founded in AD 841 -- the same year as Viking Dublin... A defensive rampart, consisting of a deep ditch and a bank, was excavated and, while the results of radio carbon tests are awaited to confirm the date, it "has all the appearances of the main fortification of the Viking fortress," he said. The excavations have also uncovered part of a human skull, a whorl for spinning thread and a brooch pin. Dr Pat Wallace,...