Mater Dei Institute of Education (Irish: Institiúid Oideachais Mater Dei) is a linked college of Dublin City University since 1999, located in Drumcondra, Dublin City, Ireland, near Croke Park, on the site of what was formerly Clonliffe College, the Roman Catholic Seminary for the Archdiocese of Dublin. The college was founded by Archbishop John Charles McQuaid in 1966 as an institute for the training and formation for teachers of religion in secondary schools in the Republic of Ireland. Clonliffe was also affiliated to the Angelicum in Rome that offered a three year course leading to a diploma and a four year course leading to a Masters; Fr. Joseph Carroll was its first president. The foundation of the college was a response to the challenges posed by the Second Vatican Council.