1 s 3 and a car 4 in a shaft s 4 the car 4 is moved by at least one car drive not illustrated with knowledge of the disclosed technologies the expert can however also realize an elevator installation with several cars for a building with a greater or lesser number of floors the passengers can enter and leave the car interior of the car 4 by way of at least one door 1 2 according to fig1 and 2 each floor s 1 s 3 has a floor door 2 and the car 4 has a car door 1 the floor doors 2 and the car door 1 are opened and or closed by at least one door drive not illustrated the disclosed technologies can be realized with couplable doors 1 2 and or non couplable doors 1 2 for example at a floor stop when the car 4 stops at a floor s 1 s 3 a floor door 2 is coupled with the car door 1 and opened and closed together by a door drive the door drive can be arranged at the car door 1 and or at the floor door 2 however it is also possible to not couple the doors 1 2 with one another so that each door 1 2 has an own door drive with knowledge of the disclosed technologies the expert can obviously also realize an elevator installation a with a car with several car doors for example with a first car door at a front side of the car and with a second car door at.