What cities have been built on top of other cities?

There are several cities that we are familiar with today that were built on top of older cities, many decades ago. They are Edinburgh, Scotland which was built over an older city after the great plague, San Francisco, London, Seattle, Rome, Paris, maybe more.

You can find a lot of information on this from The History Channel's series and DVDs "Cities of the Underworld" (http://www.history.com/minisite.do?content_type=mini_home&mini_id=53900) or the University College London's Center for Spatial Theory.

You can also find some information on this topic by using Wikipedia or google to look for information on tours of the underground cities the I listed.