Prussia is not a country anymore(since the end of World War 2), now several different countries are settled where it was. The biggest one is Germany and most of the Prussian citizens resettled there.
germany
It is a reference to the Europeans who settled in that area. They had Germanic roots and Old Prussia was defeated by Germans. To celebrate or remember that victory they are used the name New Prussia. Today it is just the name of the town.
Prussia ceased to exist at the end of World War 2. Most of the population of East Prussia, Pommernia and Silesia was expelled and resettled in West Germany in 1945-47.
New East Prussia ended in 1807.
New East Prussia was created in 1795.
Prussia is now modern day Germany
The King of Prussia took leadership of the new Germany.
Fredrick II the Great of Prussia.
Prussia
The noble landowners of Prussia were known as Junkers.
Prince Heinrich of Prussia's birth name is Albert Wilhelm Heinrich Hohenzollern von Preuen.
Prussia