Original: In the Thirty Years ' War ( 1618-1648 ) the towns suffered plundering and destruction which led to a loss of power ; Potsdam became the new capital , and the court left the town of Brandenburg .
Simplified: In the Thirty Years ' War ( 1618-1648 ) the towns were robbed and destroyed . Potsdam became the new capital , and the Royal Court left the town of Brandenburg .