A4 page format
Autobahn signs
Billy Clever
Bobby - Car
Bosch drill
Braun wrist watch
deposit bottle for mineral water
Edition Suhrkamp
Faber castell pencil
Fischer's masonry plugs
Hansaplast plaster
Imperial oven
Juwel stapler
Kölln oat flake package
Leibniz butter biscuits
Leitz files
Liquorice wheel
Lufthansa logo
Nivea cream tin
The Porsche 911
Pyramidal roof of the Olympic stadium
Rimowa's business case
Siemens outdoor mobile phone
Standard European litre glass
Tempo paper tissues packaging
WMF spice shaker


Hermann Bahlsen not only invented the shape of the biscuit, but also introduced the word "Keks" into German, deriving from the English word "cakes". At the end of the 19th century it was all the rage to name products after famous people. Since the biscuits were made in Hanover, the obvious choice was to name them after a famous person from the city: The man chosen was the mathematician Gottfried Wilhelm Leibniz, who, among other things, developed differential equations. Numbers are still very important when making butter biscuits today. The edge of the biscuit has 52 "teeth", and if there is one more or less, it's an imitation.

Leibniz butter biscuits by Bahlsen,
designed by Hermann Bahlsen, 1891.