PSA: If you didn’t know that the term “ghetto” originally referred exclusively to walled Jewish quarters, where they were required to live by law, now you do.
The first ghetto was the Venetian Ghetto, set up officially in 1516. This was considered extremely tolerant and permissive, since the standard at the time was that Jews weren’t allowed to live anywhere, and if you saw a Jew after dark you were legally allowed to kill them. The establishment of the Ghetto meant that there was a safe space for Jews, who came to Venice fleeing the Inquisition (often on their way to points east, namely Poland and the Ottoman Empire.)
The more you know.