The papers of Milltown Park concern the Jesuit community (1861-1979) and works which have occurred there: Tabor House (1969-1993); The Milltown Institute (1968-1992) and The Irish School of Ecumenics (1969-1980). There are references to the missions, chaplaincy, villas, finances, customs, property retreats, library, customs, rules, studies, health, staff, ordinations, the establishment and eventual closure of a retreat centre at Tabor House, the foundation of courses in theology and philosophy for the training of religious and lay people, Milltown Lectures (1960-1970), Lay Retreat Association and the establishment of the Irish School of Ecumenics.
Material is in the form of handwritten letters, ledgers, postcards, accounts, architectural plans, cuttings from newspapers, maps, photographs, menus, bills and receipts.