Fortification: Port na Tri Namad (port of the 3 rivers or 3 enemies)
Fortification in Derry City and Strabane, Northern Ireland, dating from the Medieval
- Type:
- Fortification
- Period:
- Medieval
- Where:
- Derry City and Strabane, United Kingdom
- Coordinates:
- 54.82°N, 7.48°W
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