An Post has issued two stamps to mark the 400th anniversary of the Plantation of Ulster.
The two 55 cent stamps come in Irish and English language versions.
The design of the stamps features a cartouche, or decorated frame, which was a feature of maps at the time.
In 1609, Protestant settlers from England and Scotland began the systematic colonisation of land confiscated from the Gaelic Irish in Donegal, Tyrone, Derry, Armagh, Cavan and Fermanagh.
A spokesperson for An Post said: "The new stamp recognises the significance of an event that radically changed the face of 17th Century Ulster and determined the subsequent course of the history of the island of Ireland."