No.
The Jews built, and paid for the walls.
The ghettos.
Nazis guarded the gates of the ghettos.
The Nazis did not have Polish-style ghettos in Germany, as they knew it would leave Germans uneasy, possibly very uneasy. Instead, in 1939-40 German Jews were only allowed to live in designated appartment blocks and certain streets in the main cities. The appartment blocks had a Star of David and the letter J above all entrances.
The first German built ghetto was in occupied Poland at Piotrków Trybunalski in October 1939. The Germans went on to establish at least 1,000 ghettos for Jews. The Warsaw and Lodz ghettos were established in 1940.
When the land that they were living on was claimed by force by the Nazis. Then, the Nazis built ghettos and Death Camps for the Jews.
The support that the Nazis gave to the ghettos was quickly withdrawn and the ghettos were forced to become profitable.
to keep track of where they was at
There were three types of ghettos: closed ghettos, open ghettos, and destruction ghettos. The Germans established at least 1,000 ghettos in German-occupied and annexed Poland and the Soviet Union alone. German occupation authorities established the first ghetto in Poland in PiotrkówTrybunalski in October 1939.
No. The Nazis did not establish ghettos in Germany itself, only in occupied countries. In some of the big cities in Germany Jews were compelled to live in designated 'Jewish apartment blocks' from 1939 on.
The Nazi ghettos for Jews were mainly in Poland, Lithuania, Belarus and other parts of Eastern Europe. In 1939-40 German Jews in most larger cities were forced to move into 'Jewish' appartment blocks, which were marked as such with a large J above all entrances. In most of Nazi Germany itself Jews were not put into ghettos in the sense of walled in areas. The Nazis know that that would lead to too many questions from ordinary Germans.
In practice, that is exactly what the ghettos set up by the Nazis were.
basically as soon as the Germans occupied a country, they would put the Jews into ghettos.