The Gatehouse. The comprehensive listing of medieval fortifications and castles in England and Wales.
Home | Books | Links | The Fortifications and Castles | Help | Downloads | Author Information | Contact

Fonmon Castle

In the community of Rhoose.
In the historic county of Glamorgan (Modern authority of Vale of Glamorgan, preserved county of South Glamorgan).

Built by the St. John family in the early C13 and has changed hands only once. Although most of the present castle dates from the post-medieval period, the rectangular keep was built c.1200 and is still the core of the castle. One of Fonmon's surviving towers may also be medieval in date. In later centuries the castle was enlarged by adding wings to the medieval keep.

This site has been described as a;
Masonry Castle.
The confidence that this site is a medieval fortification or palace is Certain.
Masonry ruins/remnants remains.


This site is a Grade 1 listed building protected by law*.

The Ordnance Survey Map Grid Reference is ST04746809

Modern Map fromOrdnance Survey logo

Good for landscape form and features

Modern Map from streetmap logo

Good for general location

Sources of information, references and further reading

National Monuments Record number; 300300

County Sites and Monuments Record number; 00502s, 00503s

Most of the sites or buildings recorded in this web site are NOT open to the public and permission to visit a site must always be sought from the landowner or tenant
The information on this web page may be derived from information compiled by and/or copyright of the Royal Commission on the Ancient and Historic Monuments of Wales, the four welsh archaeological trusts and other indivduals and organisations.
It is an offence to disturb a Scheduled Ancient Monument without consent. It is a destruction of everyone's heritage to remove archaeological evidence from any site without proper recording and reporting. Don't use metal detectors on historic sites without authorisation.
Please help me to make this as useful a resource as possible by contacting me if you see errors or if you can add information.
I do acknowledge the help I get with this site.
*The listed building may no be the actual medieval building, but a building on the site of, or incorporating fragments of, the described site.

Go to Previous Record Go to Next Record Back to List
This record last updated on Saturday, January 20, 2007

Home | Books | Links | The Fortifications and Castles | Help | Downloads | Author Information | Contact
¤¤¤¤¤