The castle was constructed using wealth generated primarily from the Penrhyn Slate Quarry in Bethesda.
It houses a 'slate bed' created for Queen Victoria during her 1859 visit, carved from a single piece of slate.
The castle served as a primary location for the filming of the 2022 series Andor.
Thomas Hopper designed the castle to be purposefully massive, using external stone to mimic the appearance of ancient masonry.
The building contains a collection of dolls' houses that are exact replicas of the castle itself.
The interior includes a unique 'Norman' staircase carved entirely from stone.
Penrhyn Castle is a sprawling 19th-century Neo-Norman fantasy fortress designed by Thomas Hopper for the wealthy Pennant family. It stands on a site previously occupied by a medieval manor house once belonging to Llywelyn the Last. The interior features ornate plasterwork, stone carvings, and a significant collection of fine art, including works by Canaletto and Richard Wilson. Its design incorporates industrial wealth derived from the Penrhyn Quarry, which was once the world's largest slate quarry. The estate encompasses 60 acres of landscaped grounds, including a Victorian walled garden, exotic plant collections, and woodland walks. The architectural style draws heavily from Norman military fortifications, featuring thick walls and heavy turrets. The site is currently managed by the National Trust and hosts a dedicated railway museum within the former stable block. Visitors can explore both the opulent state rooms and the service areas that reveal the domestic hierarchy of the era.
The view from the terrace looking out over the Menai Strait towards the Snowdonia mountain range.
Wear comfortable, flat-soled shoes as the historic floors and grounds involve significant walking.
Dedicate time to the Railway Museum located in the former stables, which is often overlooked by main castle visitors.
Check the National Trust website before arrival for any temporary room closures due to conservation work.
Do not mistake the estate entrance for the main city centre; the grounds are extensive and separate from the town.
The castle and gardens operate on seasonal opening patterns; check for potential winter closures or reduced availability in early spring.
No photography with flash inside the historic rooms to protect delicate art; avoid touching wall coverings and carvings.
