Ancient Monuments

History on the Ground

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Ffynnon Gybi

A Scheduled Monument in Llanystumdwy, Gwynedd

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Latitude: 52.9456 / 52°56'44"N

Longitude: -4.3421 / 4°20'31"W

OS Eastings: 242729

OS Northings: 341255

OS Grid: SH427412

Mapcode National: GBR 5F.LFQD

Mapcode Global: WH44C.87L6

Entry Name: Ffynnon Gybi

Scheduled Date:

Source: Cadw

Source ID: 3162

Cadw Legacy ID: CN037

Schedule Class: Religious, Ritual and Funerary

Category: Holy Well

Period: Medieval

County: Gwynedd

Community: Llanystumdwy

Traditional County: Caernarfonshire


The monument comprises the remains of a complex arrangement of two pools, an adjoining cottage and an adjacent latrine built over the stream, all standing to eaves height.

Most of the masonry is thought to date from the 18th century, with some re-building in the 19th century of the cottage walls.

The well is situated in a valley below Llangybi church, alongside a stream which feeds into the Afon Erch.

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

Source: Cadw

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