The archbishops were in charge of the area from the outbreak of the World War II- known as the Emergency in the Republic of Ireland - through to Vatican II and the rise of the "Celtic Tiger".
They presided over a period of unprecedented social, religious and economic change in the country.
Throughout the decades however, the four men appear to have taken a very similar approach to tackling the issue of clerical child abuse - an issue which would eventually bring down a government and rock the Irish Catholic Church to its very foundations.
Only one of the four, the former Cardinal Desmond Connell, is still alive to witness how their actions have been assessed by Thursday's report.
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