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.
Prussia began as a small territory in what was later called West and East Prussia, which is now Warmia-Masuria of northern Poland, the Kaliningrad Oblast exclave of Russia, and the KlaipÄda Region of Lithuania.