Duchy of Silesia was created in 1163.
Duchy of Silesia ended in 1918.
Silesia Province was created in 1815.
New Silesia was created in 1795.
Silesia Rebels was created in 2006.
Austrian Silesia was created in 1742.
Duchy of Racibórz was created in 1172.
Duchy of Westphalia was created in 1180.
Duchy of Bielsko was created in 1572.
Duchy of Głubczyce was created in 1172.
Duchy of Zator was created in 1454.
Duchy of Limburg was created in 1065.
Duchy of Friuli was created in 569.