An interface device for a cabin monument, in particular for assembly in an aircraft or spacecraft, including a routing device, a first plurality of interface connection sockets, which are connected to the routing device via a first plurality of connection lines and to which a vehicle interface of the aircraft or spacecraft can be connected. A second plurality of interface connection sockets are provided which are connected to the routing device via a second plurality of connection lines and to which a cabin monument can be connected. The routing device is constructed so as to selectively electrically connect interface connection sockets of the first plurality of interface connection sockets to interface connection sockets of the second plurality of interface connection sockets.