 The town centre retains its narrow mediaeval street plan, as well as much of its mediaeval timber architecture.Pickled gherkin manufacture and wine-growing are the two principal agricultural products, and the Neckarsulm-Gundelsheim Weingärtnergenossenschaft (vintner's co-operative) is reputed to be the oldest in all of Germany.The most remarkable building in Gundelsheim is Castle Horneck, a former residence of the Teutonic order, now hosting the Transylvanian Museum.