A stamp issued yesterday by An Post marks the 50th anniversary of the UN's Universal Declaration of Human Rights.
Other new stamps commemorate the bicentenary of Newtown School in Waterford, the centenary of Mary Immaculate College, Limerick, and Irish post-boxes.
The post-box stamp celebrates its role in the development of the postal service. Post-boxes have been in use in Ireland since 1856, when the Ashworth box - described as an elegant square box - was placed in Dublin, Belfast and Ballymena.
Newtown School was founded by the Society of Friends - the Quakers - in 1798 to provide an education in all things "civil and useful". The school now has 360 boys and girls from an original intake of 35 pupils.
Mary Immaculate College was established in 1898 by Bishop Edward Dwyer of Limerick to provide teacher training.
It became part of the National University of Ireland in 1974 and is now associated with the University of Limerick.
The Universal Declaration of Human Rights is based on recommendations made in 1946 by the Commission on Human Rights, which was chaired by Eleanor Roosevelt following the second World War. The United Nations accepted its recommendations in 1948.
The Human Rights stamp will cost 45p, the Newtown School stamp 40p and the Mary Immaculate stamp 30p. The four 30p postbox stamps commemorate four historic designs.