Informative plaque about St Patrick's Hall in Dublin Castle

informative plaque st patricks hall dublin castle historical information irish president inauguration ceremony room mideighteenth century vincenzo waldre medieval hall painted ceiling cultural heritage architecture history educational irish history ceremonial knights of st patrick douglas hyde viceroy historical exhibit reading text heritage site presidential ceremonies visitor information cultural site detailed history ceremonial hall irish culture interior landmark exhibition educational sign wall plaque historical significance craftsmanship art traditional president of ireland historical context documentation