| Cadfan Stone | |
|---|---|
| Carreg Cadfan | |
 | |
| Material | Stone |
| Height | 2.3m originally (now 2.18m) |
| Width | 0.25m |
| Depth | 0.2m |
| Period/culture | 7th-9th centuries |
| Present location | St Cadfan's Church, Tywyn |
The Cadfan Stone (Welsh: Carreg Cadfan)[1] is a 7th-9th century stone that has the earliest known Welsh language inscription, specifically in Old Welsh. The stone is located inside St Cadfan's Church, Tywyn, Gwynedd.
- ^ The Antiquary. E. Stock. 1881. p. 221.