Ancient Monuments

History on the Ground

This site is entirely user-supported. See how you can help.

Plas Yr Alarch Moated Site

A Scheduled Monument in Castle Caereinion (Castell Caereinion), Powys

We don't have any photos of this monument yet. Why don't you be the first to send us one?

Upload Photo »

Approximate Location Map
Large Map »

If Google Street View is available, the image is from the best available vantage point looking, if possible, towards the location of the monument. Where it is not available, the satellite view is shown instead.


Latitude: 52.6279 / 52°37'40"N

Longitude: -3.2125 / 3°12'45"W

OS Eastings: 318024

OS Northings: 304038

OS Grid: SJ180040

Mapcode National: GBR 9X.7HQQ

Mapcode Global: WH79V.M6FQ

Entry Name: Plas Yr Alarch Moated Site

Scheduled Date: 4 September 1992

Source: Cadw

Source ID: 487

Cadw Legacy ID: MG219

Schedule Class: Domestic

Category: Moated Site

Period: Medieval

County: Powys

Community: Castle Caereinion (Castell Caereinion)

Traditional County: Montgomeryshire


The monument comprises the remains of a well-preserved medieval moated homestead. Plas yr Alarch is very well-defined by ditches on the E, W and S sides. On the W side, the ditch is 7m wide, c.1.0m deep and is bounded by a 4m wide bank on the outside which extends to the S beyond the moated area. On the southern side, the ditch is 5m wide and 0.9m deep. On the E side, the ditch broadens from being 4.0m at the S end to 7m at its N end. The eastern ditch is bounded by a slight mound. The interior slopes slightly and has a square platform at its N end which is partly defined by discontinuous lengths of stones set into the turf, clearly the basal remains of a stone-built structure probably of late post medieval date.

The monument is of national importance for its potential to enhance our knowledge of medieval settlement. The monument is well preserved and is an important relic of the medieval landscape. It retains significant archaeological potential, with a strong probability of the presence of intact archaeological deposits and structural evidence.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

Other nearby scheduled monuments is an independent online resource and is not associated with any government department. All government data published here is used under licence. Please do not contact for any queries related to any individual ancient or schedued monument, planning permission related to scheduled monuments or the scheduling process itself. is a Good Stuff website.