What is recorded here

Twmbarlwm Hillfort and Castle stands above Caerphilly, carrying marks from the Iron Age and Medieval period. Men may have climbed its slopes to watch valleys, defend herds, or simply belong somewhere visible. The hill still holds that old human urgency, unchanged by time.

The National Monuments Record of Wales records Twmbarlwm Hillfort and Castle as Hillfort; Castle from the Iron Age; Medieval period. The saved point comes from the official national record. Inclusion does not by itself mean that the public may enter the place.

Twmbarlwm Hillfort and Castle was originally built as an Iron Age hillfort and later adapted as a medieval castle, though specific builders and dates remain unidentified. It is important as a rare example of a site that shows both prehistoric and medieval defensive structures in south Wales.

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