| Castell y Bere | |
|---|---|
| Llanfihangel-y-pennant, Wales | |
 Castell y Bere | |
  Castell y Bere | |
| Coordinates | 52°39′29″N 3°58′17″W / 52.65818°N 3.9715°W |
| Type | Linear castle |
| Site information | |
| Owner | Cadw |
| Condition | Ruined |
| Site history | |
| Built | Began 1221 |
| Built by | Llywelyn the Great |
| In use | Open to public |
| Materials | Siltstone |
| Events | Welsh Wars Prince Madoc's Rebellion |
Castell y Bere is a Welsh castle near Llanfihangel-y-pennant in Gwynedd, Wales. Constructed by Llywelyn the Great in the 1220s, the stone castle was intended to maintain his authority over the local people and to defend the south-west part of the princedom of Gwynedd. In 1282, war with Edward I of England resulted in the death of Llywelyn's grandson, Llywelyn ap Gruffudd, and Castell y Bere fell to English forces. Edward I expanded the castle further and established a small town beside it. In 1294 the Welsh leader Madog ap Llywelyn mounted a major revolt and the castle was besieged and apparently burnt. Edward did not repair it and it became ruined. Today it is in the hands of Cadw and operated as a tourist attraction.