Einbecker Brauhaus keeps alive the brewing tradition that made the town's name travel much farther than the town itself. Einbeck's strong beers were famous in the late Middle Ages, and the word bock is commonly traced back to the Bavarian pronunciation of Einbeck.
The brewery is close to the market square, so it fits naturally into an old-town walk. Check current tour arrangements before building a visit around it; the beer history is the point, but access can vary.