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 1226, Prussia was conquered by the Teutonic Knights, a military religious order, who converted the Prussians to Christianity. The Teutonic Knights were overthrown by the Prussians with help from Poland and Lithuania in 1454. Prussia was divided into Royal Prussia in the west and Ducal Prussia in the east. Royal Prussia was incorporated into Poland providing it with a corridor to the Baltic Sea (the Danzig Corridor). Ducal Prussia became a Polish territory.