(See previous 1965 photo where the street sign on the left is present with location). This is the same site of my 1965 photo; this photo is from - xhain.info as is noted at bottom of the photo.
Charlottenstraße corner Zimmerstraße. The paving stones embedded in the street mark the course of the Berlin Wall. After the division of the city, the border between the Soviet (middle) and the American sector (Kreuzberg) ran at the height of the Zimmerstraße through the Charlottenstraße. The left part of the street in the picture belongs to Mitte (East Berlin), the right to Kreuzberg (West Berlin).