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.
From the late 18th century, this bigger Prussia had a lot of power in North Germany; it was the strongest in politics and economics, and it had the most people. In 1871 Otto von Bismarck created the German Empire, and Prussia was the center of the empire.