In 1966 the sitting President of Ireland Éamon de Valera was inaugurated for a second term in office.

Éamon de Valera and his wife Sinéad arrive at the Pro-Cathedral Dublin for an inauguration mass. Crowds line the streets outside in the hope of catching a glimpse of Éamon de Valera who is to serve for a second term as President of Ireland. President de Valera arrived at the Pro-Cathedral with an army motor-cycle escort and was welcomed by Rev Patrick Murray.

The inauguration mass was celebrated by Monsignor John D Horgan Dean of the Faculty of Philosophy at UCD; deacon Rev Robert Smith, Chaplain at St Loman's Hospital in Palmerstown; and sub-deacon Rev Heber McMahon of the Holy Cross College in Clonliffe. The Master of Ceremonies was Rev Brendan Houlihan also from Holy Cross College. Taoiseach Sean Lemass and members of the government were also in attendance.

Éamon de Valera held the position as President of Ireland from 1959 to 1973.

An RTÉ News report broadcast on 25 June 1966. The footage shown here is mute.