On 8 March 1974 Charles de Gaulle Airport opened. Terminal 1 was built in an avant-garde design of a ten-floors-high circular building surrounded by seven satellite buildings, each with six gates. The main architect was Paul Andreu. The first terminal was built in the image of an octopus. It consists of a circular central part housing central functions like check-in and baggage claim. The passage between the third, fourth and fifth floors is done through a tangle of escalators arranged in the centre of the building. These escalators are suspended over the central court and covered with a transparent tube for insulation. Andreu initially had envisaged building several terminals on this model. Nevertheless, the first years of operation identified several defects due to the original design of the building. While adequate for journeys originating or ending in Paris, the terminal is not very suitable as a hub since it cannot be expanded. Many passengers have been disappointed to have no view of planes from the main terminal, in contrast to the situation at the airport of Orly.