1900-01-01:

1919-10-14:

1926-07-01:

1935-09-15:

1945-01-24:

1945-05-06:

1990-02-22:

2002-03-26:

2004-09-28:

1900-01-01:

1938-04-01:

1945-01-24:

2002-03-26:

2004-09-28:

2010-09-07:

1900-01-01:

GERMANY

1920-02-12:

GERMANY +

ALLIED POWERS +

FRANCE +

LEAGUE OF NATIONS +

1921-10-20:

GERMANY

1945-01-24:

SOVIET UNION

1945-05-06:

POLAND +

SOVIET UNION +

1948-01-01:

POLAND

2004-05-01:

EUROPEAN UNION +

POLAND +

1900-01-01:

  Óppeln

1945-05-06:

  Bytom

1950-01-01:

  Opole

1900-01-01:

  ÓPPELN

1945-05-06:

  GÓRNOŚLĄSK

1950-01-01:

  OPOLE

1900-01-01:

1945-01-24:

1945-05-06:

1945-08-02:

1950-01-01: