It was spite that destroyed it and pride that restored it. Like a lesson in humanity, it was the stronger and purer emotion that came to define the legacy of Warsaw's Old Town.Looking at the historic centre of the Polish capital city today, it's actually hard to believe that this vast area with thousands of beautiful buildings is just decades - rather than centuries - old. Because as I walk across the cobblestones of the main square, into the streets with their medieval layout and Renaissance and Baroque facades, it feels like the layers of heritage you expect from a...