Bryn Cader Faner is a Bronze Age round cairn which lies to the east of the small hamlet of Talsarnau in the Ardudwy area of Gwynedd in Wales.^[1] The diameter is 8.7 metres (29 ft) and there are 18 thin jagged pillars which jut upwards from the low cairn.^[2] It is thought to date back to the late third millennium BC. The site was disturbed by 19th-century treasure hunters, who left a hole in the centre, indicating the position of a cist or a grave. Originally there may have been about 30 pillars, each some 2 metres (7 ft) long. However, before the Second World War, the British Army used the site for gunnery practice. The Army damaged many of the stones on the east side.^[3][4]

Map of Bryn Cader Faner

Bryn Cader Faner is thought to mean 'the hill with the chair with the flag' or 'the hill of the throne with the flag'.