The magnificent medieval castle, turned Tudor mansion, later became the perfect antidote to writer's block. Both Dylan Thomas and author Richard Hughes put pen to paper in the castle's garden summerhouse. Looking out over the estuary, like an eagle nesting on its eyrie, this impressive relic of ancient times demands you stand and stare. It will simply take your breath away. 'Brown as owls' as Mr Thomas put it so eloquently in his 'Poem in October'. Built in the 13th century by the de Brian family, probably atop an earlier Norman ringwork castle, the solid mansion we see before us is the lasting legacy of Sir John Perrot. It didn't fare too well during the Civil War. Once captured by Parliamentary forces after a siege, it was partially dismantled.