When Donald Trump announced that the USA would recognise Jerusalem as the capital of Israel the decision hit the headlines. Then again for the last 3000 years Jerusalem has rarely been out of the news. In this episode we hear from historian Simon Sebag Montefiore, author of 'Jerusalem: the biography' about this remarkable city. He explains why it is sacred to three religions and why it has so often found itself on the front line of the great conflicts that have shaped the history of the Middle East and the wider world.