As of the 1920s ever more women became employed. Functionally organized kitchens were designed to help them save time and energy. The “Frankfurt Kitchen” offered a great deal of working space, but at the same time was so narrow that one needed only to turn round to work on the other side. The revolutionary design was based on the compact “Mitropa” railway dining-car kitchen and influenced kitchen design as far as the USA, from where it returned to Europe in the 1950s as the “fitted kitchen”.