When the English Civil Wars ended in 1649, Oliver Cromwell took over. Dublin experienced huge growth and development in the 17th century because many Protestant refugees from Europe came to Dublin. By the 17th century Dublin was the second greatest city, only behind London, and a period when great Georgian style buildings were constructed that still stand today. Georgian style architecture was popular from 1720 to 1840 during the times when George I, George II, George III, and George IV of England were ruling. (Dublin Wikitravel)