Barbican was the old city of Warsaw, but the red brick castle was later rebuilt. It was originally a defensive fortification of the ancient city of Warsaw. Now there is a small exhibition hall inside which some old pictures of Warsaw are displayed, from which we can see that Poland's fate has gone through many ups and downs.
Barbican, located in the old city of Warsaw, is a long-standing military fortress with dark red exterior walls. The battlements above the fortress are used for shooting. The whole fortress is semi-circular. The fortress was destroyed by German forces in World War II. Now it is seen rebuilt after World War II.