There is actually a town in Germany called Sandwich, the town just celebrated it's 250th Birthday. Story has it that The Earl of Sandwich played cards and was hungry one day and asked for 2 slices of bread with something nice in the centre so he could continue playing cards.
Ever since then the town of Sandwich offers combinations of all kinds that are endless
You can read about the Earl's history here --->
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Saw a segment of the story the other night on TV Channel DW (Deutsche Welle) quite interesting