Meaning any indication of the future (especially favorable) is from 1650s; earlier (1630s) in extended sense of benevolent influence of greater power, influence exerted on behalf of someone or something, originally in expression under the auspices of.
The King of Prussia Mall is located in the community of King of Prussia in Upper Merion Township, Montgomery County, Pennsylvania, 20 miles (32 km) northwest of Philadelphia.
In blue colour, the Kingdom of Prussia at its greatest extent in 1876. Source: http://en.wikipedia.org/wiki/Kingdom_of_Prussia. Today some of you have asked about Prussia several times. Here you have a map where you will be able to learn its location in the past.