Skip to main content

Visitor Notice

Following the announcement of a short ‘firebreak’ lockdown by the Welsh Government as of 6pm on Friday 23 October, all Cadw staffed and unstaffed sites will be closed until further notice.

Until we can welcome you back in person, you can visit us virtually through our Open Doors Online 3D tours. All you’ll need is a mobile phone or a desk-top computer — of if you have a VR head-set you can be fully-immersed inside your selected adventure.

Please check our Latest News for further updates, sign up to our newsletter or stay in touch through our social media channels:

Facebook @CadwWales | Twitter @cadwwales | Instagram @cadwcymruwales

Diolch and we hope to see you again soon.

Overview

Ruined castle with a regal history

It’s a surprise to find this ruin, tucked away as it is in a lane off Monmouth’s main shopping street. Strategically located at crossings of the River Wye and River Monnow, only a few fragments – ruins of the 12th-century Great Tower and 13th-century hall – remain of this once-important castle. It was founded in the 11th century by Norman lord William fitz Osbern, and by the mid-14th century was in the hands of Henry of Grosmont, who modified the tower with large decorated windows whose outline can still be seen in the east wall.

The most notable event in the tower’s history occurred on 16 September 1387, when King Henry V of Battle of Agincourt fame was born here, an occasion commemorated at Monmouth’s Agincourt Square.


Opening times

Can be viewed externally


Prices

Category Price
Admission
Free

Facilities

No drones icon No smoking icon

Directions

Road
Monmouth town centre