Canaletto masterpiece returns to Wales 80 years after it was hidden in slate mine

The Stonemason’s Yard, moved for safekeeping during WW2, is going on display at National Library of WalesDuring the second world war, the painting was transported 250 miles from central London to north Wales to be hidden in a slate mine, tucked away from the perils of Nazi invasion and Luftwaffe bombings.Eighty years on, there has been a sort of homecoming for Canaletto’s masterpiece, The Stonemason’s Yard, as it returns to form the centrepiece of a show opening this week at th