What is the area of this region of Central Europe located mostly in Poland, in which Złotniki Lubańskie was formerly part of the historic Upper Lusatia region at its border?
Złotniki Lubańskie:  Situated on the left bank of the Kwisa river, the settlement was formerly part of the historic Upper Lusatia region at the border with Silesia. Silesia: Silesia ( ; Polish: "Śląsk" ; Czech: "Slezsko" ; German:    ] ; Silesian German: "Schläsing"; Silesian: "Ślůnsk" [ɕlonsk] ; Lower Sorbian: "Šlazyńska" ; Upper Sorbian: "Šleska" ; Latin: "Silesia" ) is a region of Central Europe located mostly in Poland, with small parts in the Czech Republic and Germany.
i don't know