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A suburb north of Philadelphia, located next to Valley Forge. When Washington and the Continental Army wintered over at Valley Forge, the proprietor of a nearby tavern noted a number of Prussians in camp as military advisors. In an effort to increase business, he renamed the bar the "King of Prussia Inn"

Also the home of one of the world's largest shopping malls.
On the way to see the Liberty Bell in Philly we stopped for lunch and some shopping in King of Prussia.
by Redwood George March 21, 2005
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The mecca of malls, located in King of Prussia, Pennsylvania. "K-O-P", as it is popularly known in the surrounding region, houses the largest collection of retail stores in the United States. It is also home to the only Neiman Marcus store in the Philadelphia metropolitan area. When upscale retailers decide to open a store in the Philadelphia region, King of Prussia is usually the first or second choice. Over the past 50 years, King of Prussia has grown into one of the most prominent edge cities on the East Coast.
Since the town of King of Prussia is virtually indistinguishable from the mall, the people who live there refer to themselves as living in Upper Merion Township to avoid confusion.
by aquarius32 April 12, 2010
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