The Knight Frank Wealth Report 2012 has listed the top ten most important cities of the world, in terms of economic activity.

The ten cities have been chosen on the basis of their growing economic importance to the high-net-worth individuals (HNWIs), or those having over $25 million of investable assets).

The Wealth Report 2012 is published by Knight Frank, a London-based independent global residential and commercial property consultancy, in partnership with Citi Private Bank, Citigroup's wealth management services arm for ultra high net worth individuals, law firms, and institutional investors.

Click on Start to view the top ten cities of economic importance.