The Czech Republic's biggest excavation reveals layers of history.

Every Czech school child knows the story. Prague was a crowded medieval city bursting at the seams when, in 1348, its problem was solved at a stroke by the brilliance of Charles IV. The greatest of Czech kings ordained that a massive swathe of farmland around the walled city should become a new urban space called Nove Mesto, or New Town. The Prague we know today is said to be largely a product of Charles IV's effort at urban planning.

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http://www.archaeology.org/0511/abstracts/prague.html