Original: East Berlin was officially called Berlin , Hauptstadt der DDR ( '' Berlin , Capital of the GDR '' ) , or simply '' Berlin , '' by East Germany , and '' Berlin ( Ost ) '' by the West German government , '' Ost-Berlin '' , '' Ostberlin '' or '' Ostsektor '' by West German media .
Simplified: East Berlin was officially called Berlin , Hauptstadt der DDR ( '' Berlin , Capital of the GDR '' ) , or simply '' Berlin , '' by East Germany .