As part of the Museum of Modern Art Foundation Ludwig (MUMOK) Out Site sculpture series, artist Michael Kienzer created two sculptures on the grounds of the MuseumsQuartier. For Trailer, he placed three truck semi-trailers, whose holds contained color and light spaces in red, gold and blue. Kienzer's Doors intervention on the forecourt consisted of 30 doors, which created a single publicly accessible space, described by the artist as a "communicative artwork".