Prince Llewellyn quarry
Prince Llewelyn Terrace, the site of the quarry is behind and to the left of the houses  | |
| Location | |
|---|---|
Location in Conwy  | |
| Location | near Dolwyddelan | 
| County | Carnarvonshire (now Conwy County Borough) | 
| Country | Wales, UK | 
| Coordinates | 53°03′31″N 3°52′31″W / 53.058658°N 3.875230°W SH 743 529  | 
| Production | |
| Products | Slate | 
| Type | Quarry | 
| History | |
| Opened | c. 1820 | 
| Active | c.1820–1917; 1918–1934 | 
| Closed | 1934 | 
The Prince Llewellyn quarry (also known as Bwlch Cynnud quarry, Y Foel quarry, Hendre Ddu quarry, or Prince Llywelyn quarry) was a slate quarry that stands on the west side of the Lledr Valley, ENE of Dolwyddelan. It was worked from around 1820 to 1934.