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Denbigh Castle is one of the fortresses that formed King Edward I's "ring of castles", four of which (Caernarfon, Conwy, Harlech and Beaumaris) have been named World Heritage sites.

Construction of the castle began in 1282 by Henry de Lacy, one of Edward I's chief commanders. It was not the first stronghold to occupy this strategic site: it was built over the stronghold of Dafydd ap Gruffudd, the Welsh leader crushed by Edward in 1282.

During the Civil War (1642-1649), the then decaying castle was repaired by Colonel William Salesbury. In 1646 the castle endured a nine month siege.

When Denbigh finally surrendered on 26 October 1646, it was only after the king had personally ordered Salesbury to do so.

No booking required.

The 2025 Denbigh Open Doors Weekend launches Friday 19th September 2025 with an evening lecture exploring property deeds at the Theatr Twm o'r Nant. Over the following two days, Saturday and Sunday 20th and 21st September 2025 from 10am to 5pm more than thirty historically important sites in the locale will be open to the public, supplemented by talks and guided tours. A booking service for the sites, talks and guided tours that have a limited number of places will be available through Denbigh Library, closer to the start of the weekend. Further information will be available on:  https://darganfoddinbych.cymru  https://twitter.com/OpenDoors_D  https://www.facebook.com/opendoorsdenbighshire/

LL16 3NB

///what 3words: (Eng) ///denbigh.cries.book.ambushed (CYM) ///daeareg.gwenog.gwyntog  Bus stop in the High Street in Denbigh Town Centre, a signposted 200m walk up to the Castle. Bus services 51 from both Rhyl and Wrexham to Denbigh


Prices

Free

Event times

Day Times
Sat 20 Sep 2025
10:00 - 17:00
Sun 21 Sep 2025
10:00 - 17:00
For full site information, including seasonal opening times and facilities, please visit the Denbigh Castle monument page.