Silesia
geographical name
Si·le·sia sī-ˈlē-zh(ē-)ə 
sə-,
-sh(ē-)ə
region of east central Europe in the valley of the upper Oder River bordering on the Sudety Mountains
Note: Formerly chiefly in Germany, Silesia is now chiefly in the eastern part of the Czech Republic and southwestern Poland.
Silesian
sī-ˈlē-zh(ē-)ən
adjective or noun sə-
-sh(ē-)ən