Prussia lost its independence in the 20th century.
Prussia . In November 1918 , the monarchies were abolished and the nobility lost its political power during the German Revolution of 1918 -- 19 . The Kingdom of Prussia was thus abolished in favour of a republic -- the Free State of Prussia , a state of Germany from 1918 until 1933 . From 1933 , Prussia lost its independence as a result of the Prussian coup , when the Nazi regime was successfully establishing its Gleichschaltung laws in pursuit of a unitary state . The Kingdom ended in 1918 .