<p>In the 1930s, Dr Adolf Mahr was head of the National Museum of Ireland, where he earned the title 'the father of Irish archaeology'. He was also the head of the Nazi Party in Ireland, and was dubbed 'Dublin Nazi No. 1'. Under pressure from Irish and British military intelligence, he left for Germany shortly before the outbreak of war in 1939, never to return. To this day, he is considered in some circles to have been a spy who used his positio...