In 1961, after the construction of the Berlin Wall, East Berlin came to be recognised in GDR administration as a 15th district, though it retained a special status until the adoption of the 1968 Constitution formally designated it as Bezirk Berlin.
In 1961, following the construction of the Berlin Wall, East Berlin was officially acknowledged as a 15th district within GDR administration, retaining a unique status until it was formally designated as Bezirk Berlin in the 1968 Constitution.