Place · site
Castlereagh
Castlereagh is an area on the south-eastern edge of Belfast in Northern Ireland, named after the castle, in Irish An Caisleán Riabhach, 'the grey castle', that was the seat of the O'Neills of Clandeboye. The castle stood on high ground overlooking Belfast. The name was later used as a title by the Stewart family, as with Viscount Castlereagh, the British foreign secretary.
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Cite this entry
- APA
- The Epoch Institute. (2026). Castlereagh. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/castlereagh
- MLA
- “Castlereagh.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/castlereagh. Accessed .
- Chicago
- The Epoch Institute. “Castlereagh.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/castlereagh.
- Harvard
- The Epoch Institute (2026) ‘Castlereagh’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/castlereagh (Accessed: ).
Last reviewed October 2026Random entry ↻