Carrickabraghy Castle (Caisleán Charraig Bhrachaí) on a rocky outcrop at the north-western extremity of the Isle of Doagh in the north of Inishowen, a peninsula on the north coast of County Donegal, Ireland.
From the 9th to the 13th century Inishowen was politically divided into three 'tuatha' or districts. These were known as Aileach in the south, Bredach to the east and Carraig Bhrachai to the west. The Lords of Carraig Bhrachai ruled from the town-land of Carrickabraghy, the area where the Castle now stands. They were one of the most important families in Inishowen.
Carraig Bhrachai is not mentioned again in the history books until 1600. The present remains of the castle are thought to have been built around this time. The O Dochartaigh Clan had risen into power in Inishowen and the Chief of the clan and Lord of Inishowen was Sean Og O Dochartaigh. The English invasion of Ireland was well underway, and to protect his livestock and supplies from English raids, Sean Og decided the best place to store them was on The Isle of Doagh.
Around 1665 Carrickabraghy Castle was abandoned, and began to decline for several centuries.
Duino Castle was built by the Wallsee family in 1389 on the cliffs overlooking the Gulf of Trieste. It replaced an older castle from the 11th century. Over time, the Wallsee family disappeared and the castle, after having been used as a prison, became the residence of the Luogar and Hofer.
At the end of the 19th century it became the property of Prince Alexander von Thurn und Taxis from the Czech branch of the House of Thurn and Taxis. It remains with the family to this day with his great-grandson Prince Carlo Alessandro della Torre e Tasso, Duke of Castel Duino the current owner. The castle has been opened to the public as a museum and park.