Where was a Jewish ghetto during World War 2?

In the Jewish diaspora, a Jewish quarter is the area of a city traditionally inhabited by Jews. Jewish quarters, like the Jewish ghettos in Europe, were often the outgrowths of segregated ghettos instituted by the surrounding Christian authorities or in World War Two, the Nazis. A Yiddish term for a Jewish quarter or neighborhood is "Di yiddishe gas" (Yiddish: די ייִדדישע גאַס ), or "The Jewish street". Many European and Middle Eastern cities once had a historical Jewish quarter and some still have it.