The first two Ghettos in the city were established by the Germans in the Fleming District (Miaouli Ghetto) and Singrou District(Singrou Ghetto), in the east and the west part of the city respectively. These were formerly neighbourhoods with a dense, yet not exclusively Jewish population. There was no ghetto in the city before it was occupied by the Germans.
(Source: Mark Mazower, Inside Hitler's Greece: The Experience of Occupation, 1941-44, New Haven and London)
The third Ghetto was established in the Baron Hirsch Quarter, one of the poorest Jewish working class neighbourhoods accross the Old Train Station. During the German occupation it was turned into a concentration camp, infact into a place of martyrdom, where the Nazis assembled the Jews before they deported them to death camps in Poland.
The Campbell Pogrom
During the night of June 29, 1931 and continuing into the early hours of the next morning, the entire Jewish settlement of Camp Campbell was destroyed by fire and 500 families made homeless, when christian Greeks, members of the fascist organisation E.E.E. unleashed a pogrom.