That’s not the case, even though this large tomb is roofed by a formidable stone 18ft/5.5m long by 15ft/4.6m wide weighing an estimated 25 tons, one of the biggest in Britain.
Nid hynny mo’r gwir, er bod y beddrod hwn ymhlith y mwyaf ym Mhrydain, dan ei do carreg anferthol sydd 18 troedfedd/5.5m o hyd a 15 troedfedd/4.6m o led ac yn pwyso 25 tunnell, yn ôl pob tyb.