Why this matters
Old Mountjoy Castle in County Tyrone was built in the early 17th century by the MacDonnell family, an Irish clan allied with the Crown. It is remembered as a symbol of the plantation period and the complex political alliances in Ulster during the reign of James I.
What is recorded here
Old Mountjoy is recorded as a castle in County Tyrone. Its open map record supplies this location and any linked names or public references.