Gwynedd hill fort was medieval, dig discovers

An archaeological dig in Gwynedd has discovered that what was thought to be an Iron Age fort was a medieval castle.

Researchers are now certain the remains uncovered at Llanwnda near Caernarfon date to the 11th or 12th Century - but its owners remain a mystery.

The Hen Castell - Old Castle site - was the focus of surveys and digs over a two year period.

Researchers have now animated a 3-D model of the entire location.