Basically Bismarck united Prussia with all the other German independent states (25 in all) into a collective German nation for the first time since the Holy Roman Empire.
Prussia was officially dissolved in 1947.
Usually not. However, during the Seven Years' War a part of Prussia briefly became Russian from 1758 until 1763. After World War 2 a part of Prussia became Russian again. This "Russian Prussia" is called Kaliningrad Oblast. The other parts of (Old Baltic) Prussia are now part of Poland and Lithuania. Prussia has two meanings: The (German) Kingdom of Prussia on one hand and Old/Baltic Prussia on the other hand. The Kingdom of Prussia got its name from the original Baltic Prussia (in Old Prussian language it is called "Prūsa"). The original Baltic Prussia was the easternmost province of the Kingdom of Prussia. That Province of Prussia inside the Kingdom of Prussia was most of the time parted into East Prussia and West Prussia.
Prussia was created in 1525.
Austria and Prussia
Prussia was the state and former kingdom of Germany. Austria became a vassal state to Prussia. Later on Austria and Prussia become little more than just vassal state.
Prussia originated as the Teutonic Knights.
Prussia.....=D Prussia.....=D
South Prussia was created in 1793.
South Prussia ended in 1807.
West Prussia was created in 1773.
Province of Prussia was created in 1829.
Rise of Prussia happened in 2010.