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| Always thought the current course of the Schanzengraben was the same as the medieval moat, but looking at the map it seems to have been in the Bahnhofstrasse area (as the OP pointed out). | |
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I'm not a Zürcher. I just spent a few years there. All I know is that the Schanzengraben was a fortification moat (that's what the word "Schanze" = entrenchment means), but probably post-medieval. The now Bahnhofstrasse area was the "Fröschengraben" = frogs' moat in the Middle Ages. It's up to the locals to correct me.