A bridge design sketched nearly 500 years ago by Leonardo da Vinci has been built in Norway, 2,400km north of the spot where it was intended to be built.
Da Vinci designed the bridge in 1502 to cross the Golden Horn inlet at Istanbul.
At 346m the stone bridge would have been the world's longest at the time. The modern day version, commissioned by the Norwegian highway department, is a 100m long timber structure costing £930,000. It is said to be the first time one of Da Vinci's civil engineering designs has been built.