A section of Dublin's 900-year-old Viking city wall has been put on public view for the first time at the city council's civic offices on the Southside. When the Viking settlement site -- built in the 10th century AD near Christchurch Cathedral -- was first excavated over 30 years ago it caused huge controversy. The city wall at the time was earmarked for demolition and storage at another site but thousands of people demanded that the historically important area be preserved from a development that was designed to house the Dublin City civic offices. Measuring just under 20 metres in...