The comprehensive gazetteer and bibliography of the medieval castles, fortifications and palaces of England, Wales, the Islands.
The listings
Other Info
Print Page 
Next Record 
Previous Record 
Back to list 

Castell Gronw, Bala

Also known as, or recorded in historical documents as;
Llangower; Castell Gronw Bevr o Benllyn

In the community of Llangywer.
In the historic county of Merioneth.
Modern authority of Gwynedd.
Preserved county of Gwynedd.

OS Map Grid Reference: SH93003503
Latitude 52.90186° Longitude -3.59226°

Castell Gronw, Bala has been described as a certain Timber Castle.

There are earthwork remains.

This site is a scheduled monument protected by law.


A mound identified as a medieval castle site, situated on the south bank of the Dee where it leaves Bala Lake. This is a mutilated generally circular mound, roughly 20-23m in diameter and 4.5m high, with a level summit some 9.0m across. There is no trace of a ditch. A curving boundary ditch to the south-west is thought to represent a bailey enclosure roughly 25-35m deep. However, nowhere else in the county has a bailey attached to a castle mound been identified. The name has been linked to Goronwy ab Ednyfed Fychan, steward to Llywelyn ap Gruffudd, who died in 1268. The main castle of Penllyn was across the river at Bala and the status and indeed the very identification of this mound are unclear. (Coflein–John Wiles 10.07.07)

A motte situated in the garden of Pen y Bont cottage. It is 23m in diameter at thr base, between 4 and 4.5m high, and 10m diameter across the top. the north and east sides of the mound are terminated by retaining walls over 1m high, which mark the boundaey of the cottage on the east and the pavement on the north. The north side of the motte has been planted with flowering shrubs and other garden plants; the remaining side are mainly grass covered, although the remains of a flower bed are visible on the south side. A concrete pad 2.5m by 2m has been laid on the top of the mound. The septic tanks which serve the cottage lie 8m to the south of the base of the motte. A wooded area west of the motte is thought to be the site of the bailey. This area is bounded by a stream lying in a gully 2m deep on the west and south sides. The remains of a slight scarp or ditch are visible running in a south westerly direction from the motte, but it turns south before reaching the gully. (Scheduling Report)
Links to archaeological and architectural databases, mapping and other online resources

Data >
Coflein   County HER   Scheduling        
Maps >
Streetmap   NLS maps   Where's the path   Old-Maps      
Data/Maps > 
Magic   Historic Wales   V. O. B.   Geology   LIDAR  
Air Photos > 
Bing Maps   Google Maps   Getmapping   ZoomEarth      
Photos >
CastleFacts   Geograph   Flickr   Panoramio      

Sources of information, references and further reading
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.
It is an offence to disturb a Scheduled 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.
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 individuals and organisations. It may also contain Designated Historic Asset Descriptive Information from The Welsh Historic Environment Service (Cadw), licensed under the Open Government Licence. All the sources given should be consulted to identify the original copyright holder and permission obtained from them before use of the information on this site for commercial purposes.
The author and compiler of Gatehouse does not receive any income from the site and funds it himself. The information within this site is provided freely for educational purposes only.
The bibliography owes much to various bibliographies produced by John Kenyon for the Council for British Archaeology, the Castle Studies Group and others.
Suggestions for finding online and/or hard copies of bibliographical sources can be seen at this link.
Minor archaeological investigations, such as watching brief reports, and some other 'grey' literature is most likely to be held by H.E.R.s but is often poorly referenced and is unlikely to be recorded here, or elsewhere, but some suggestions can be found here.
The possible site or monument is represented on maps as a point location. This is a guide only. It should be noted that OS grid references defines an area, not a point location. In practice this means the actual center of the site or monument may often, but not always, be to the North East of the point shown.
Locations derived from OS grid references and from latitude longitiude may differ by a small distance.
Further information on mapping and location can be seen at this link.
Lidar coverage in the UK is not complete. The button above will give an idea of the area of coverage. Higher resolution lidar images in both DSM and DTM form may be available from Lle A geo-Portal for Wales (click the preview tag to bring up a map and then select format byclicking on the small blue diamond in the top right corner of the map.)
Please help to make this as useful a resource as possible by contacting Gatehouse if you see errors, can add information or have suggestions for improvements in functality and design.
Help is acknowledged.

This record last updated 06/07/2016 18:59:46