A great subterranean bar, which is a labyrinth of nooks and crannies spread over three levels. The name pays homage to the former name of ul. Piwna, which itself got the name from the beer brewed by the family of Johannes Hevelius, an astronomer by night (of course) but a brewer by day. The Jopengasse Pub is part of the legacy of this old brewing district and you can enjoy a range of craft beers while sitting at tables, which resemble museum display cases. There’s lots of Danzig memorabilia and you can also order food at the Under the Fish baked potato restaurant upstairs. If you want to visit old Danzig this is as good a place as any, as while much above ground level has been rebuilt, these cellars are original!