The interiors of cars in the past seem very basic when compared to those of today. Luxury materials such as precious wood and leather are still present in some models, but the dashboard has changed a lot. On most pre-war models, the driver had few indications at his disposal. For example, the Bugatti Royale – the most expensive car in the world in the 1930s – had no fuel gauge, no speedometer and no ammeter. These classic cars are on display in the Masterpieces section of the Cité de l’Automobile-Collection Schlumpf (City of Automobile-Schlumpf Collection) in Mulhouse.